Csharp/C Sharp by API/System.Drawing/Graphics

Graphics.Clear

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class RandomClear: Form 
{
     public static void Main()
     {
          Application.Run(new RandomClear());
     }
     public RandomClear()      
     {
          Text = "Random Clear";
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics graphics = pea.Graphics;
          Random   rand = new Random();
   
          graphics.Clear(Color.FromArgb(rand.Next(256),
                                    rand.Next(256),
                                    rand.Next(256)));
     }
}

Graphics.CopyFromScreen

  
using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
using System.Drawing.Drawing2D;
public class Form1 : Form
{
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Button cmdCapture;
        private System.Windows.Forms.PictureBox pictureBox1;
      public Form1() {
            InitializeComponent();
            
      }
        private void cmdCapture_Click(object sender, EventArgs e)
        {
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();
            Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
            Graphics g = Graphics.FromImage(bmp);
            g.CopyFromScreen(0, 0, 0, 0, bmp.Size);
            g.Dispose();
            pictureBox1.Image = bmp;
            pictureBox1.Size = bmp.Size;
        }
        private void InitializeComponent()
        {
            this.panel1 = new System.Windows.Forms.Panel();
            this.cmdCapture = new System.Windows.Forms.Button();
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.panel1.SuspendLayout();
            ((System.ruponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                        | System.Windows.Forms.AnchorStyles.Left)
                        | System.Windows.Forms.AnchorStyles.Right)));
            this.panel1.AutoScroll = true;
            this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.panel1.Controls.Add(this.pictureBox1);
            this.panel1.Location = new System.Drawing.Point(8, 8);
            this.panel1.Size = new System.Drawing.Size(270, 233);
            this.cmdCapture.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
            this.cmdCapture.Location = new System.Drawing.Point(169, 249);
            this.cmdCapture.Size = new System.Drawing.Size(110, 30);
            this.cmdCapture.Text = "Capture Screen";
            this.cmdCapture.UseVisualStyleBackColor = true;
            this.cmdCapture.Click += new System.EventHandler(this.cmdCapture_Click);
            this.pictureBox1.Location = new System.Drawing.Point(0, 0);
            this.pictureBox1.Size = new System.Drawing.Size(100, 50);
            this.pictureBox1.TabStop = false;
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(290, 288);
            this.Controls.Add(this.cmdCapture);
            this.Controls.Add(this.panel1);
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.Text = "Screen Capture";
            this.panel1.ResumeLayout(false);
            ((System.ruponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
        }
      [STAThread]
      static void Main()
      {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
      }
}

Graphics.DashCap

  
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class PenDashCaps: Form
{
     MenuItem miChecked;
   
     public static void Main()
     {
          Application.Run(new PenDashCaps());
     }
     public PenDashCaps()
     {
          ResizeRedraw = true; 
   
          Menu = new MainMenu();
          Menu.MenuItems.Add("&Width");
   
          int[] aiWidth = { 1, 2, 5, 10, 15, 20, 25 };
   
          foreach (int iWidth in aiWidth)
               Menu.MenuItems[0].MenuItems.Add(iWidth.ToString(), 
                                        new EventHandler(MenuWidthOnClick));
   
          miChecked = Menu.MenuItems[0].MenuItems[0];
          miChecked.Checked = true;
     }
     void MenuWidthOnClick(object obj, EventArgs ea)
     {
          miChecked.Checked = false;
          miChecked = (MenuItem) obj;
          miChecked.Checked = true;
          Invalidate();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }      
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen pen = new Pen(clr, Convert.ToInt32(miChecked.Text));
          pen.DashStyle = DashStyle.DashDotDot;
   
          foreach (DashCap dc in Enum.GetValues(typeof(DashCap)))
          {
               pen.DashCap = dc;
   
               grfx.DrawLine(pen, cx / 8, cy / 4, 7 * cx / 8, cy / 4); 
               grfx.TranslateTransform(0, cy / 4);
          }
     }
}

Graphics.Dispose()

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class BlockOut: Form
{
     bool      bBlocking, bValidBox;
     Point     ptBeg, ptEnd;
     Rectangle rectBox;
   
     public static void Main()
     {
          Application.Run(new BlockOut());
     }
     protected override void OnMouseDown(MouseEventArgs mea)
     {
          if (mea.Button == MouseButtons.Left)
          {
               ptBeg = ptEnd = new Point(mea.X, mea.Y);
   
               Graphics grfx = CreateGraphics();
               grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
               grfx.Dispose();
   
               bBlocking = true;
          }
     }
     protected override void OnMouseMove(MouseEventArgs mea)
     {
          if (bBlocking)
          {
               Graphics grfx = CreateGraphics();
               grfx.DrawRectangle(new Pen(BackColor), Rect(ptBeg, ptEnd));
               ptEnd = new Point(mea.X, mea.Y);
               grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
               grfx.Dispose();
               Invalidate();
          }
     }
     protected override void OnMouseUp(MouseEventArgs mea)
     {
          if (bBlocking && mea.Button == MouseButtons.Left)
          {
               Graphics grfx = CreateGraphics();
               rectBox = Rect(ptBeg, new Point(mea.X, mea.Y));
               grfx.DrawRectangle(new Pen(ForeColor), rectBox);
               grfx.Dispose();
   
               bBlocking = false;
               bValidBox = true;
               Invalidate();
          }
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx = pea.Graphics;
   
          if (bValidBox)
               grfx.FillRectangle(new SolidBrush(ForeColor), rectBox);
   
          if (bBlocking)
               grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
     }
     Rectangle Rect(Point ptBeg, Point ptEnd)
     {
          return new Rectangle(Math.Min(ptBeg.X, ptEnd.X),
                               Math.Min(ptBeg.Y, ptEnd.Y),
                               Math.Abs(ptEnd.X - ptBeg.X),
                               Math.Abs(ptEnd.Y - ptBeg.Y));
     }
}

Graphics.DpiX

  
  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  using System.Drawing.Imaging;
  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    static void Main() 
    {
      Application.Run(new Form1());
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
      Graphics g = e.Graphics;
      Bitmap bmp = new Bitmap("winter.jpg");
      g.DrawImage(bmp, 0, 0);
      Console.WriteLine("Screen resolution: " + g.DpiX + "DPI");
      Console.WriteLine("Image resolution: " + bmp.HorizontalResolution + "DPI");
      Console.WriteLine("Image Width: " + bmp.Width);
      Console.WriteLine("Image Height: " + bmp.Height);
      SizeF s = new SizeF(bmp.Width * (g.DpiX / bmp.HorizontalResolution),
                bmp.Height * (g.DpiY / bmp.VerticalResolution));
      Console.WriteLine("Display size of image: " + s);
    }
    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

Graphics.DpiY

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class DotsPerInch: Form
{
     public static void Main()
     {
          Application.Run(new DotsPerInch());
     }
     public DotsPerInch()
     {
          ResizeRedraw = true;  
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.DrawString(String.Format("DpiX = {0}\nDpiY = {1}",
                                        grfx.DpiX, grfx.DpiY),
                          Font, new SolidBrush(clr), 0, 0);
     }
}

Graphics.DrawArc

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class LineArcCombo: Form
{
     public static void Main()
     {
          Application.Run(new LineArcCombo());
     }
     public LineArcCombo()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }        
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen pen = new Pen(clr, 25);
   
          grfx.DrawLine(pen,  25, 100, 125, 100);
          grfx.DrawArc (pen, 125,  50, 100, 100, -180, 180);
          grfx.DrawLine(pen, 225, 100, 325, 100);
     }
}

Graphics.DrawBeziers

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class BezierArt: Form
{
   
     public static void Main()
     {
          Application.Run(new BezierArt());
     }
     public BezierArt()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,200, 200);
     }       
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen      pen  = new Pen(clr);
          PointF[] aptf = new PointF[4];
   
          int iNum = 100;
 
          for (int i = 0; i < iNum; i++)
          {
               double dAngle = 2 * i * Math.PI / iNum;
   
               aptf[0].X =     cx / 2 + cx /  2 * (float) Math.Cos(dAngle);
               aptf[0].Y = 5 * cy / 8 + cy / 16 * (float) Math.Sin(dAngle);
   
               aptf[1] = new PointF(cx / 2,    -cy);
               aptf[2] = new PointF(cx / 2, 2 * cy);
   
               dAngle += Math.PI;
   
               aptf[3].X = cx / 2 + cx /  4 * (float) Math.Cos(dAngle);
               aptf[3].Y = cy / 2 + cy / 16 * (float) Math.Sin(dAngle);
   
               grfx.DrawBeziers(pen, aptf);
          }
     }
}

Graphics.DrawEllipse

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class TryOneInchEllipse: Form
{
     public static void Main()
     {
          Application.Run(new TryOneInchEllipse());
     }
     public TryOneInchEllipse()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.DrawEllipse(new Pen(clr), 0, 0, grfx.DpiX, grfx.DpiY);
     }
}

Graphics.DrawIcon(Icon icon, int x, int y)

   

/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace IconImageDraw_c
{
    /// <summary>
    /// Summary description for IconImageDraw.
    /// </summary>
  public class IconImageDraw : System.Windows.Forms.Form
  {
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ruponentModel.Container components = null;
    public IconImageDraw()
    {
      //
      // Required for Windows Form Designer support
      //
      InitializeComponent();
      this.MouseMove += new MouseEventHandler(this.DrawBox);
      this.MouseDown += new MouseEventHandler(this.StartBox);
      this.MouseUp += new MouseEventHandler(this.EndBox);
    }
    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }
        #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
      // 
      // IconImageDraw
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(492, 373);
      this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
      this.MinimizeBox = false;
      this.Name = "IconImageDraw";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "IconImageDraw";
      this.Load += new System.EventHandler(this.IconImageDraw_Load);
    }
        #endregion
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    /// 
    //"R" holds the image, "Box" is the new image home currently being 
    //drawn by holding the mouse down and dragging
    private Rectangle R = Rectangle.Empty;
    private Rectangle Box = Rectangle.Empty;
    private Image I = Image.FromFile("sample.jpg");
    private Icon ThisIcon = new Icon("usa.ico");
    private bool OK2Paint = false;
    [STAThread]
    static void Main() 
    {
      Application.Run(new IconImageDraw());
    }
    private void IconImageDraw_Load(object sender, System.EventArgs e)
    {
    }
    protected override void OnPaint ( PaintEventArgs e )
    {
      //Always draw the icon
      e.Graphics.DrawIcon(ThisIcon, 1, 1);
      //Bail if rectangle is empty
      if ( R == Rectangle.Empty )
        return;
      if ( !OK2Paint )
        return;
      Pen P = new Pen(Brushes.Black, 3);
      e.Graphics.DrawRectangle(P, R);
      // Draw image based on rectangle.
      e.Graphics.DrawImage(I, R);
      P.Dispose();
    }
    private void DrawBox ( System.Object sender , MouseEventArgs m )
    {
      //Prints the x,y coordinates directly on the screen
      Graphics G = this.CreateGraphics();
      Rectangle TextR = new Rectangle(10, this.Height-50, 100, 20 );
      SolidBrush B = new SolidBrush(this.BackColor);
      G.FillRectangle(B, TextR);
      G.DrawString ( m.X.ToString() + ", " + m.Y.ToString(), 
                      new Font("Arial", 10),
                      Brushes.Black, TextR, StringFormat.GenericDefault );
      B.Dispose();
      //Draw the box as the mouse drags
      if ( m.Button == MouseButtons.Left )
      {
        if ( Box != Rectangle.Empty )
        {
          Pen P = new Pen(new SolidBrush(this.BackColor),1);
          G.DrawRectangle ( P, Box );
          P.Dispose();
        }
        Box = new Rectangle ( R.X, R.Y, m.X - R.X, m.Y - R.Y );
        G.DrawRectangle( Pens.Black, Box );
      }
    }
    private void StartBox( System.Object sender , MouseEventArgs m )
    {
      if ( m.Button == MouseButtons.Left )
      {
        R.X=m.X;
        R.Y=m.Y;
        OK2Paint = false;
      }
    }
    private void EndBox( System.Object sender , MouseEventArgs m )
    {
      R.Width = m.X - R.X;
      R.Height = m.Y - R.Y;
      OK2Paint = true;
      this.Refresh();
    }
  }
}

Graphics.DrawImage(Image i, int x, int y);

   
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.IO;
public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e) {
        string p = "icon.ico";
        Icon ic = new Icon(p);
        this.Icon = ic;  // Icon 1)
        Graphics g = e.Graphics;
        g.DrawIcon(ic, 0, 0);  // Icon 2)
        Image i = ic.ToBitmap();
        g.DrawImage(i, 50, 0);  // Icon 3)

        g.Dispose();
    }
}

Graphics.DrawImage(Image img, int x, int y, int width, int height)

  
using System;
using System.Drawing;
using System.Windows.Forms;
   
class ImageReflection: Form
{
     Image image = Image.FromFile("Color.jpg");
   
     public static void Main()
     {
          Application.Run(new ImageReflection());
     }
     public ImageReflection()
     {
          ResizeRedraw = true;
          
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          int cxImage = image.Width;
          int cyImage = image.Height;
   
          grfx.DrawImage(image, cx / 2, cy / 2,  cxImage,  cyImage);
          grfx.DrawImage(image, cx / 2, cy / 2, -cxImage,  cyImage);
          grfx.DrawImage(image, cx / 2, cy / 2,  cxImage, -cyImage);
          grfx.DrawImage(image, cx / 2, cy / 2, -cxImage, -cyImage);
     }
}

Graphics.DrawImage(Image, Points[])

  
using System;
using System.Drawing;
using System.Windows.Forms;
   
class ImageAtPoints: Form
{
     Image image = Image.FromFile("Color.jpg");
   
     public static void Main()
     {
          Application.Run(new ImageAtPoints());
     }
     public ImageAtPoints()
     {
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }        
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.DrawImage(image, new Point[] { new Point(cx / 2, 0),
                                              new Point(cx,     cy / 2),
                                              new Point(0,      cy / 2)});
               
        
     }
}

Graphics.DrawImage(im, rec, recPart, GraphicsUnit.Pixel)

   
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace ImageZoom
{
    /// <summary>
    /// Summary description for ImageZoom.
    /// </summary>
    public class ImageZoom1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.RadioButton radioButton1;
        private System.Windows.Forms.RadioButton radioButton2;
        private System.Windows.Forms.RadioButton radioButton3;
        private System.Windows.Forms.RadioButton radioButton4;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.CheckBox checkBox1;
        Image im = null;
        Image im2 = null;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public ImageZoom1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            this.Text = "Zooming";
            this.label1.Text = "";
            this.groupBox1.Text = "Zoom";
            this.checkBox1.Text = "Paint";
            this.radioButton1.Checked = false;
            this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            this.radioButton2.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            this.radioButton3.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            this.radioButton4.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.checkBox1 = new System.Windows.Forms.CheckBox();
            this.radioButton1 = new System.Windows.Forms.RadioButton();
            this.radioButton2 = new System.Windows.Forms.RadioButton();
            this.radioButton3 = new System.Windows.Forms.RadioButton();
            this.radioButton4 = new System.Windows.Forms.RadioButton();
            this.label2 = new System.Windows.Forms.Label();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(8, 16);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(200, 240);
            this.label1.TabIndex = 0;
            this.label1.Text = "label1";
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                    this.checkBox1,
                                                                                    this.radioButton1,
                                                                                    this.radioButton2,
                                                                                    this.radioButton3,
                                                                                    this.radioButton4});
            this.groupBox1.Location = new System.Drawing.Point(232, 48);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(72, 128);
            this.groupBox1.TabIndex = 1;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "groupBox1";
            // 
            // checkBox1
            // 
            this.checkBox1.Location = new System.Drawing.Point(8, 32);
            this.checkBox1.Name = "checkBox1";
            this.checkBox1.Size = new System.Drawing.Size(56, 24);
            this.checkBox1.TabIndex = 1;
            this.checkBox1.Text = "checkBox1";
            this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
            // 
            // radioButton1
            // 
            this.radioButton1.Location = new System.Drawing.Point(8, 64);
            this.radioButton1.Name = "radioButton1";
            this.radioButton1.Size = new System.Drawing.Size(16, 24);
            this.radioButton1.TabIndex = 0;
            this.radioButton1.Text = "radioButton1";
            // 
            // radioButton2
            // 
            this.radioButton2.Location = new System.Drawing.Point(40, 64);
            this.radioButton2.Name = "radioButton2";
            this.radioButton2.Size = new System.Drawing.Size(16, 24);
            this.radioButton2.TabIndex = 0;
            this.radioButton2.Text = "radioButton1";
            // 
            // radioButton3
            // 
            this.radioButton3.Location = new System.Drawing.Point(8, 96);
            this.radioButton3.Name = "radioButton3";
            this.radioButton3.Size = new System.Drawing.Size(16, 24);
            this.radioButton3.TabIndex = 0;
            this.radioButton3.Text = "radioButton1";
            // 
            // radioButton4
            // 
            this.radioButton4.Location = new System.Drawing.Point(40, 96);
            this.radioButton4.Name = "radioButton4";
            this.radioButton4.Size = new System.Drawing.Size(16, 24);
            this.radioButton4.TabIndex = 0;
            this.radioButton4.Text = "radioButton1";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(328, 16);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(200, 240);
            this.label2.TabIndex = 0;
            this.label2.Text = "label1";
            // 
            // ImageZoom
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(536, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.groupBox1,
                                                                          this.label1,
                                                                          this.label2});
            this.Name = "ImageZoom";
            this.Text = "ImageZoom";
            this.groupBox1.ResumeLayout(false);
            this.ResumeLayout(false);
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new ImageZoom1());
        }
        protected override void OnPaint(PaintEventArgs e)
        {   ImageZoom();    }
        private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
        {   ImageZoom();    }
        private void radioButtons_CheckedChanged(object sender, System.EventArgs e)
        {   ImageZoom();    }
        protected void ImageZoom()
        {
            Graphics g1 = Graphics.FromHwnd(this.label1.Handle);
            Graphics g2 = Graphics.FromHwnd(this.label2.Handle);
            Rectangle rec;
            Rectangle recPart;
            if (this.checkBox1.Checked) 
            {
                if (im == null) ReadImage();
         
                rec = new Rectangle(0, 0, label1.Width, label1.Height);
                g1.DrawImage(im, rec);
                
                // Center part:
                recPart = new Rectangle(im.Width/4, im.Height/4, im.Width/2,
                    im.Height/2);
                if(this.radioButton1.Checked)  // Left-Top part
                    recPart = new Rectangle(0, 0, im.Width/2, im.Height/2);
                if(this.radioButton2.Checked)  // Right-Top part
                    recPart = new Rectangle(im.Width/2, 0, im.Width/2, im.Height/2);
                if(this.radioButton3.Checked)  // Left-Down part
                    recPart = new Rectangle(0, im.Height/2, im.Width/2, im.Height/2);
                if(this.radioButton4.Checked)  // Right-Down part
                    recPart = new Rectangle(im.Width/2, im.Height/2, im.Width/2,
                        im.Height/2);
                g2.DrawImage(im, rec, recPart, GraphicsUnit.Pixel);
            }
            else 
            {
                Clear(g1);
                Clear(g2);
            }
            g1.Dispose();   g2.Dispose();      
        }
        protected void ReadImage()
        {
            string path = @"szeret3.BMP";
            im = Image.FromFile(path);
            this.radioButton1.Enabled = true;
            this.radioButton2.Enabled = true;
            this.radioButton3.Enabled = true;
            this.radioButton4.Enabled = true;
        }
        protected void Clear(Graphics g)
        {
            g.Clear(this.BackColor);
            g.Dispose();        
            im = null;
            im2 = null;
            this.radioButton1.Checked = false;
            this.radioButton2.Checked = false;
            this.radioButton3.Checked = false;
            this.radioButton4.Checked = false;
            
            this.radioButton1.Enabled = false;
            this.radioButton2.Enabled = false;
            this.radioButton3.Enabled = false;
            this.radioButton4.Enabled = false;
        }
    }
}

Graphics.DrawLine(Pen p, int x0,int y0, int x1, int y1)

  

  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    static void Main() 
    {
      Application.Run(new Form1());
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Graphics g = e.Graphics;
      g.FillRectangle(Brushes.White, this.ClientRectangle);
      Pen p = new Pen(Color.Black);
      g.DrawLine(p, 0, 0, 100, 100);
      p.Dispose();
    }
    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

Graphics.DrawLine(Pen,Point point1, Point point2)

   
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class frmScribble : System.Windows.Forms.Form {
    private System.ruponentModel.Container components = null;
    private bool mouseDown = false;
    private Point lastPoint = Point.Empty;
    private string color = "black";
    private Graphics g;
    private Pen p;
    public frmScribble() {
        g = CreateGraphics();
        p = new Pen(Color.FromName(color));
    }
    protected override void OnMouseDown(MouseEventArgs e) {
        mouseDown = true;
        if (e.Button == MouseButtons.Right) {
            ContextMenu m = new ContextMenu();
            m.MenuItems.Add(0, new MenuItem("black", new EventHandler(RightMouseButton_Click)));
            m.MenuItems.Add(1, new MenuItem("white", new EventHandler(RightMouseButton_Click)));
            m.MenuItems.Add(2, new MenuItem("red", new EventHandler(RightMouseButton_Click)));
            m.MenuItems.Add(3, new MenuItem("green", new EventHandler(RightMouseButton_Click)));
            m.MenuItems.Add(4, new MenuItem("blue", new EventHandler(RightMouseButton_Click)));
            m.Show(this, new Point(e.X, e.Y));
        }
    }
    protected void RightMouseButton_Click(object sender, EventArgs e) {
        color = ((MenuItem)sender).Text;
        p = new Pen(Color.FromName(color));
    }
    protected override void OnMouseUp(MouseEventArgs e) {
        mouseDown = false;
    }
    protected override void OnMouseMove(MouseEventArgs e) {
        if (lastPoint.Equals(Point.Empty)) lastPoint = new Point(e.X, e.Y);
        if (mouseDown) {
            Point pMousePos = new Point(e.X, e.Y);
            g.DrawLine(p, pMousePos, lastPoint);
        }
        lastPoint = new Point(e.X, e.Y);
    }
    [STAThread]
    static void Main() {
        Application.Run(new frmScribble());
    }
}

Graphics.DrawLines(Pen pen, Point[] points)

   
 
using System;
using System.Drawing;
using System.Windows.Forms;
   
class WidePolyline: Form
{
     public static void Main()
     {
          Application.Run(new WidePolyline());
     }
     public WidePolyline()
     {
   
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }       
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen pen = new Pen(clr, 25);
   
          grfx.DrawLines(pen, new Point[] {
                         new Point( 25, 100), new Point(125, 100),
                         new Point(125,  50), new Point(225,  50),
                         new Point(225, 100), new Point(325, 100) });
     }
}

Graphics.DrawPie

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class PieChart: Form
{
     int[] aiValues = { 50, 100, 25, 150, 100, 75 };
   
     public static void Main()
     {
          Application.Run(new PieChart());
     }
     public PieChart()
     {
          Text = "Pie Chart";
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Rectangle rect   = new Rectangle(50, 50, 200, 200);
          Pen       pen    = new Pen(clr);
          int       iTotal = 0;
          float     fAngle = 0, fSweep;
   
          foreach(int iValue in aiValues)
               iTotal += iValue;
   
          foreach(int iValue in aiValues)
          {
               fSweep = 360f * iValue / iTotal;
               DrawPieSlice(grfx, pen, rect, fAngle, fSweep);
               fAngle += fSweep;
          }
     }
     protected virtual void DrawPieSlice(Graphics grfx, Pen pen, 
                                         Rectangle rect,
                                         float fAngle, float fSweep)
     {
          grfx.DrawPie(pen, rect, fAngle, fSweep); 
     }
}

Graphics.DrawRectangle

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class OutlineClientRectangle: Form
{
     public static void Main()
     {
          Application.Run(new OutlineClientRectangle());
     }
     public OutlineClientRectangle()
     {
          Text = "Client Rectangle";
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.DrawRectangle(Pens.Red, 0, 0, cx - 1, cy - 1);
     }
}

Graphics.DrawRectangles

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
          
          grfx.DrawRectangles(pen, new Rectangle[] {new Rectangle(8, 2, 4, 4)});
     }
}

Graphics.DrawString

    

using System;
using System.Drawing;
using System.Windows.Forms;
   
class TwoPaintHandlers
{
     public static void Main()
     {
          Form form      = new Form();
          form.Text      = "Two Paint Handlers";
          form.BackColor = Color.White;
          form.Paint    += new PaintEventHandler(PaintHandler1);
          form.Paint    += new PaintEventHandler(PaintHandler2);
   
          Application.Run(form);
     }
     static void PaintHandler1(object objSender, PaintEventArgs pea)
     {
          Form     form = (Form)objSender;
          Graphics graphics = pea.Graphics;
   
          graphics.DrawString("First Paint Event Handler", form.Font, 
                          Brushes.Black, 0, 0);
     }
     static void PaintHandler2(object objSender, PaintEventArgs pea)
     {
          Form     form = (Form)objSender;
          Graphics graphics = pea.Graphics;
   
          graphics.DrawString("Second Paint Event Handler", form.Font, 
                          Brushes.Black, 0, 100);
     }
}

Graphics.EnumerateMetafileProc

   
/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace MetaEnum_c
{
    public class MetaEnum : System.Windows.Forms.Form
    {
        private System.ruponentModel.Container components = null;
        private System.Windows.Forms.ListBox LB;
        Metafile mf = new  Metafile("mymeta.emf");
        public MetaEnum()
        {
            InitializeComponent();
        }
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            mf.Dispose();
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
      this.LB = new System.Windows.Forms.ListBox();
      this.SuspendLayout();
      // 
      // LB
      // 
      this.LB.Location = new System.Drawing.Point(208, 232);
      this.LB.Name = "LB";
      this.LB.Size = new System.Drawing.Size(168, 121);
      this.LB.TabIndex = 1;
      // 
      // MetaEnum
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(392, 373);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                  this.LB});
      this.MaximizeBox = false;
      this.MinimizeBox = false;
      this.Name = "MetaEnum";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "MetaEnum";
      this.Load += new System.EventHandler(this.MetaEnum_Load);
      this.ResumeLayout(false);
      }
        #endregion
        [STAThread]
        static void Main() 
        {
            Application.Run(new MetaEnum());
        }
    private void MetaEnum_Load(object sender, System.EventArgs e)
    {
    }
    protected override void OnPaint(PaintEventArgs e)
    {
      Graphics G = e.Graphics;
      G.EnumerateMetafile( mf, new Point( 50, 50 ), 
                   new Graphics.EnumerateMetafileProc(this.MetafileCallback) );
    }
    // Define callback method.
    private bool MetafileCallback( EmfPlusRecordType recordType, int flags, 
                                                 int dataSize, IntPtr data,
                                                 PlayRecordCallback callbackData)
    {
      LB.Items.Add(recordType);
      if ( dataSize > 0 )
      {
        byte[] D = new byte[dataSize];
        Marshal.Copy(data, D, 0, dataSize);
        mf.PlayRecord(recordType, flags, dataSize, D);
      }
      return true;
    }
    }
}

Graphics.FillClosedCurve

   

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class ClosedCurveFillModes: Form
{
     public static void Main()
     {
          Application.Run(new ClosedCurveFillModes());
     }
     ClosedCurveFillModes()
     {
        ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }       
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Brush   brush = new SolidBrush(clr);
          Point[] apt   = new Point[5];
          
          for (int i = 0; i < apt.Length; i++)
          {
               double dAngle = (i * 0.8 - 0.5) * Math.PI;
               apt[i] = new Point(
                              (int)(cx *(0.25 + 0.24 * Math.Cos(dAngle))),
                              (int)(cy *(0.50 + 0.48 * Math.Sin(dAngle))));
          }
          grfx.FillClosedCurve(brush, apt, FillMode.Alternate);
   
          for (int i = 0; i < apt.Length; i++) 
               apt[i].X += cx / 2;         
   
          grfx.FillClosedCurve(brush, apt, FillMode.Winding);
     }
}

Graphics.FillEllipse

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          Text = "Four by Fours";
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
          
          grfx.FillEllipse(brush, new Rectangle(14, 8, 4, 4));
     }
}

Graphics.FillEllipse(Brush brush,int x, int y,int width,int height)

   
using System;
using System.Drawing;
using System.Windows.Forms;

public class Test : Form {
 
  private RadioButton square = new RadioButton();
  private RadioButton circle = new RadioButton();
  private ComboBox color = new ComboBox();
 
  private Color c = Color.Red;
 
  public Test( ) {
    Text = "Select Item";
    square.Text = "Square";
    circle.Text = "Circle";
    color.Text = "Choose a color";
 
    Size = new Size(400,250);
 
    int w = 20;
    square.Location = new Point(w, 30);
    circle.Location = new Point(w += 10 + square.Width, 30);
    color.Location = new Point(w += 10 + circle.Width, 30);
 
    color.Items.Add("Red");
    color.Items.Add("Green");
    color.Items.Add("Blue");
 
    Controls.Add(square);
    Controls.Add(circle);
    Controls.Add(color);
 
    square.CheckedChanged += new EventHandler(Checked_Changed); 
    circle.CheckedChanged += new EventHandler(Checked_Changed); 
    color.SelectedIndexChanged += new EventHandler(Selected_Index); 
  }
 
  protected override void OnPaint(PaintEventArgs e){
    Graphics g = e.Graphics;
    Brush brush = new SolidBrush(c);
    if (square.Checked)
      g.FillRectangle(brush,100,100,100,100);
    else
      g.FillEllipse(brush,100,100,100,100);
    base.OnPaint( e );
  }
 
  protected void Selected_Index(Object sender, EventArgs e){
    if (color.SelectedItem.ToString() == "Red" )
      c = Color.Red;
    else if (color.SelectedItem.ToString() == "Green")
      c = Color.Green;
    else
      c = Color.Blue;
    Invalidate();
  }
 
  protected void Checked_Changed(Object sender, EventArgs e) {
    Invalidate();
  }
  static void Main() {
    Application.Run(new Test());
  }
}

Graphics.FillPath(Brushes.AliceBlue, myPath);

   

  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  public class Form1 : System.Windows.Forms.Form
  {
    GraphicsPath myPath = new GraphicsPath();
    private bool isImageClicked = false;
    public Form1()
    {
      InitializeComponent();
      myPath.StartFigure();
      myPath.AddLine(new Point(150, 10), new Point(120, 150));
      myPath.AddArc(200, 200, 100, 100, 0, 90);
      Point[] points = {new Point(350, 325), new Point(250, 350), new Point(250, 250), new Point(350, 275)};
      myPath.AddCurve(points);
      myPath.CloseFigure();
      CenterToScreen();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "Form1";
      this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    static void Main() 
    {
      Application.Run(new Form1());
    }
    private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
    {
      Point mousePt = new Point(e.X, e.Y);
            
            if(myPath.IsVisible(mousePt))
      {
        isImageClicked = true;
        this.Text = "You clicked the strange shape...";
      } else {
        isImageClicked = false;
        this.Text = "Images";
      }
      Invalidate();
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Graphics g = e.Graphics;
      g.FillPath(Brushes.AliceBlue, myPath);
      if(isImageClicked == true)
      {
        Pen outline = new Pen(Color.Black, 2);
                g.DrawPath(outline, myPath);
      }
    }
  }

Graphics.FillPolygon

   

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class OwnerDrawButtons: Form
{
     readonly int    cxImage, cyImage;
     readonly int    cxBtn, cyBtn, dxBtn;
     readonly Button btnLarger, btnSmaller;
   
     public static void Main()
     {
          Application.Run(new OwnerDrawButtons());
     }
     public OwnerDrawButtons()
     {
          ResizeRedraw = true;
   
          cxImage = 4 * Font.Height;
          cyImage = 4 * Font.Height;
          cxBtn = cxImage + 8;
          cyBtn = cyImage + 8;
          dxBtn = Font.Height;
   
          btnLarger = new Button();
          btnLarger.Parent = this;
          btnLarger.Size   = new Size(cxBtn, cyBtn);
          btnLarger.Click += new EventHandler(ButtonLargerOnClick);
          btnLarger.Paint += new PaintEventHandler(ButtonOnPaint);
   
          btnSmaller = new Button();
          btnSmaller.Parent = this;
          btnSmaller.Size   = new Size(cxBtn, cyBtn);
          btnSmaller.Click += new EventHandler(ButtonSmallerOnClick);
          btnSmaller.Paint += new PaintEventHandler(ButtonOnPaint);
   
          OnResize(EventArgs.Empty);
     }
     protected override void OnResize(EventArgs ea)
     {
          base.OnResize(ea);
   
          btnLarger.Location =
                         new Point(ClientSize.Width / 2 - cxBtn - dxBtn / 2,
                                  (ClientSize.Height - cyBtn) / 2);
          btnSmaller.Location =
                         new Point(ClientSize.Width / 2 + dxBtn / 2,
                                  (ClientSize.Height - cyBtn) / 2);
     }
     void ButtonLargerOnClick(object obj, EventArgs ea)
     {
         Console.WriteLine("clicked large");
     }
     void ButtonSmallerOnClick(object obj, EventArgs ea)
     {
         Console.WriteLine("clicked small");
     }
     void ButtonOnPaint(object obj, PaintEventArgs pea)
     {
          Button   btn  = (Button) obj;
          Graphics grfx = pea.Graphics; 
   
          ControlPaint.DrawButton(grfx, 0, 0, cxBtn, cyBtn, 
               (btn == (Button) GetChildAtPoint(
                                   PointToClient(
                                        MousePosition))) && 
                    btn.Capture ? ButtonState.Pushed : ButtonState.Normal);
   
          GraphicsState grfxstate = grfx.Save();
   
          grfx.TranslateTransform((cxBtn - cxImage) / 2, (cyBtn - cyImage) / 2);               
          DrawLargerButton(grfx, cxImage, cyImage);
   
          grfx.Restore(grfxstate);
   
          if (btn.Focused)
               ControlPaint.DrawFocusRectangle(grfx, 
                    new Rectangle((cxBtn - cxImage) / 2 + cxImage / 16,
                                  (cyBtn - cyImage) / 2 + cyImage / 16,
                                  7 * cxImage / 8, 7 * cyImage / 8));
     }
     void DrawLargerButton(Graphics grfx, int cx, int cy)
     {
          Brush brush = new SolidBrush(btnLarger.ForeColor);
          Pen   pen   = new Pen(btnLarger.ForeColor);
   
          grfx.TranslateTransform(cx / 2, cy / 2);
   
          for (int i = 0; i < 4; i++)
          {
               grfx.DrawLine(pen, 0, 0, cx / 4, 0);
               grfx.FillPolygon(brush, new Point[] {
                                       new Point(cx / 4, -cy / 8),
                                       new Point(cx / 2,       0),
                                       new Point(cx / 4,  cy / 8)});
               grfx.RotateTransform(90);
          }
     }     
    
}

Graphics.FillRectangle

    
using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
public class Form1 : Form {
    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    Font f = new Font("Times New Roman", 12);
    Font bf = new Font(f, FontStyle.Bold);
    StringFormat sf = new StringFormat();
    float[] ts = { 10.0f, 70.0f, 100.0f, 90.0f };
    sf.SetTabStops(0.0f, ts);
    string s1 = "\tA\tAA\tAAA\tAAAA";
    string s2 = "\tAAAA\tAAA\tAA\tA";
    string s3 = "\tAAAAAAAA\tAAAAAAA\tAAAAAA\tAAAAA\n\tAAAA\tAAA\tAA\tAA";
    g.DrawString(s1, bf, Brushes.Black, 20, 20, sf);
    g.DrawString(s2, f, Brushes.Blue, 20, 20 + bf.Height, sf);
    g.DrawString(s3, f, Brushes.Blue, 20,
                      20 + bf.Height + f.Height, sf);
    f.Dispose();
    bf.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

Graphics.FillRectangles

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          Text = "Four by Fours";
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
          
          grfx.FillRectangles(brush, new Rectangle[] 
                                             {new Rectangle(8, 8, 4, 4)});
     }
}

Graphics.FillRegion

  
  using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  using System.Drawing.Imaging;
  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    static void Main() 
    {
      Application.Run(new Form1());
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
      Graphics g = e.Graphics;
      g.FillRectangle(Brushes.White, this.ClientRectangle);
      GraphicsPath gp = new GraphicsPath();
      gp.AddLine(10, 10, 10, 50);
      gp.AddBezier(10, 50, 120, 55, 25, 70, 30, 70);
      gp.AddLine(30, 70, 60, 70);
      gp.AddBezier(60, 70, 305, 70, 90, 55, 90, 50);
      gp.AddLine(90, 50, 90, 30);
      gp.StartFigure();
      gp.AddLine(60, 110, 40, 160);
      gp.AddLine(40, 160, 60, 180);
      // Create a Region whose boundary is the above GraphicsPath 
      Region reg = new Region(gp);
      g.FillRegion(Brushes.Green, reg);
      reg.Dispose();
      gp.Dispose();
    }
    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

Graphics.FromHwnd()

   
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace Cube
{
    /// <summary>
    /// Summary description for CubeImage.
    /// </summary>
    public class CubeImage : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public CubeImage()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            this.Text = "Picture Cube";
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            // 
            // CubeImage
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 189);
            this.Name = "CubeImage";
            this.Text = "CubeImage";
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new CubeImage());
        }
        protected override void OnPaint(PaintEventArgs pea)
        {
            CubeDBuf();
        }
        private void CubeDBuf()
        {
            Graphics g;
            string path;
            int x = 100, y = 40;
            Point A = new Point( 10,  50);
            Point B = new Point(180,  50);
            Point C = new Point( 10, 170);
    
            Point a = new Point(A.X + x, A.Y - y);
            Point b = new Point(B.X + x, B.Y - y);
            Point Z = new Point(B.X, C.Y);
            Point[] p3Fro = {A, B, C};
            Point[] p3Top = {a, b, A};
            Point[] p3Rig = {B, b, Z};
            Bitmap bm = new Bitmap(B.X +x, C.Y + y);
            g = Graphics.FromImage(bm);
 
            path = @"IndonHouses.bmp";
            Image im1 = Image.FromFile(path);
            g.DrawImage(im1, p3Fro);
            path = @"Pyramids.BMP";
            Image im3 = Image.FromFile(path);
            g.DrawImage(im3, p3Top);
            path = @"TadjMahal.bmp";
            Image im2 = Image.FromFile(path);
            g.DrawImage(im2, p3Rig);
    
            g = Graphics.FromHwnd(this.Handle);
            g.DrawImage(bm, 1, 1);
            g.Dispose();
        }
    }
}

Graphics.FromImage

    

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form {
    private void Form1_Paint(object sender,
        System.Windows.Forms.PaintEventArgs p) {
        Graphics g = p.Graphics;
    }
    private void createManually() {
        Graphics g;
        g = this.CreateGraphics();
    }
    private void createFromFile() {
        Graphics g;
        Bitmap b;
        b = new Bitmap("C:\\E.bmp");
        g = Graphics.FromImage(b);
    }
    private void drawLine() {
        Graphics g;
        g = this.CreateGraphics();
        Icon i = new Icon(@"C:\Desktop.ico");
        g.DrawIcon(i, 150, 15);
    }
}

Graphics.InterpolationMode

  
using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;
public class Form1 : Form {
    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    Bitmap bmp = new Bitmap("rama.jpg");
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    int width = bmp.Width;
    int height = bmp.Height;
    g.InterpolationMode = InterpolationMode.NearestNeighbor;
    g.DrawImage(
      bmp,
      new Rectangle(10, 10, 120, 120),    // source rectangle
      new Rectangle(0, 0, width, height), // destination rectangle
      GraphicsUnit.Pixel);
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

Graphics.MeasureString

   

using System;
using System.Drawing;
using System.Windows.Forms;
   
class SysInfoColumns: Form
{
     public static void Main()
     {
          Application.Run(new SysInfoColumns());
     }
     public SysInfoColumns()
     {
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx  = pea.Graphics;
          Brush    brush = new SolidBrush(ForeColor);
          SizeF    sizef;
          float    cxCol, y = 0;
          int      cySpace;
   
          sizef   = grfx.MeasureString("ArrangeStartingPosition ", Font);
          cxCol   = sizef.Width;
          cySpace = Font.Height;
   
          grfx.DrawString("ArrangeDirection", Font, brush, 0, y);
          grfx.DrawString(SystemInformation.ArrangeDirection.ToString(), 
                          Font, brush, cxCol, y);
          y += cySpace;
   
          grfx.DrawString("ArrangeStartingPosition", Font, brush, 0, y);
          grfx.DrawString(
               SystemInformation.ArrangeStartingPosition.ToString(), 
               Font, brush, cxCol, y);
          y += cySpace;
   
          grfx.DrawString("BootMode", Font, brush, 0, y);
          grfx.DrawString(SystemInformation.BootMode.ToString(), 
                          Font, brush, cxCol, y);
          y += cySpace;
   
          grfx.DrawString("Border3DSize", Font, brush, 0, y);
          grfx.DrawString(SystemInformation.Border3DSize.ToString(), 
                          Font, brush, cxCol, y);
          y += cySpace;
   
          grfx.DrawString("BorderSize", Font, brush, 0, y);
          grfx.DrawString(SystemInformation.BorderSize.ToString(), 
                          Font, brush, cxCol, y);
          y += cySpace;
   
          grfx.DrawString("CaptionButtonSize", Font, brush, 0, y);
          grfx.DrawString(SystemInformation.CaptionButtonSize.ToString(), 
                          Font, brush, cxCol, y);
     }
}

Graphics.PageScale

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class ArbitraryCoordinates: Form
{
     public static void Main()
     {
          Application.Run(new ArbitraryCoordinates());
     }
     public ArbitraryCoordinates()
     {
          Text = "Arbitrary Coordinates";
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected  void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.PageUnit = GraphicsUnit.Pixel;
          SizeF sizef = grfx.VisibleClipBounds.Size;
          grfx.PageScale = Math.Min(sizef.Width  / grfx.DpiX / 1000, 
                                    sizef.Height / grfx.DpiY / 1000);
   
          grfx.DrawEllipse(new Pen(clr), 0, 0, 990, 990);
     }
}

Graphics.PageUnit

   
using System;
using System.Drawing;
using System.Windows.Forms;
   
class ArbitraryCoordinates: Form
{
     public static void Main()
     {
          Application.Run(new ArbitraryCoordinates());
     }
     public ArbitraryCoordinates()
     {
          Text = "Arbitrary Coordinates";
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected  void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.PageUnit = GraphicsUnit.Pixel;
          SizeF sizef = grfx.VisibleClipBounds.Size;
   
          grfx.DrawEllipse(new Pen(clr), 0, 0, 990, 990);
     }
}

Graphics.PixelOffsetMode

  
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class AntiAlias: Form
{
     public static void Main()
     {
          Application.Run(new AntiAlias());
     }
     public AntiAlias()
     {
          Text = "Anti-Alias Demo";
          BackColor = SystemColors.Window;
          ForeColor = SystemColors.WindowText;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx = pea.Graphics;
          Pen      pen  = new Pen(ForeColor);
   
          grfx.PixelOffsetMode = PixelOffsetMode.Default;
   
          grfx.DrawLine(pen, 2, 2, 18, 10);
     }
}

Graphics.ReleaseHdc

  
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
   
class CreateMetafileMemory: Form
{
     MemoryStream ms = new MemoryStream();
   
     public static void Main()
     {
          Application.Run(new CreateMetafileMemory());
     }
     public CreateMetafileMemory()
     {
          ResizeRedraw = true; 
   
          Graphics grfx = CreateGraphics();
          IntPtr ipHdc = grfx.GetHdc();
   
          Metafile mf = new Metafile(ms, ipHdc); 
   
          grfx.ReleaseHdc(ipHdc);
          grfx.Dispose();
          grfx = Graphics.FromImage(mf);
   
          grfx.FillEllipse(Brushes.Gray, 0, 0, 100, 100);
          grfx.DrawEllipse(Pens.Black, 0, 0, 100, 100);
          grfx.DrawArc(new Pen(Color.Red, 10), 20, 20, 60, 60, 30, 120);
          grfx.Dispose();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }        
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          ms.Position = 0;
          Metafile mf = new Metafile(ms);
   
          for (int y = 0; y < cy; y += mf.Height)
          for (int x = 0; x < cx; x += mf.Width)
               grfx.DrawImage(mf, x, y, mf.Width, mf.Height);
     }
}

Graphics.RotateTransform

  
using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
public class Form1 : Form {
    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    Font f = new Font("Times New Roman", 24);
    g.DrawString("Rotate then Translate", f, Brushes.Black, 0, 0);
    g.RotateTransform(45);
    g.TranslateTransform(150, 0);
    g.DrawString("Rotate  then Translate ", f, Brushes.Black, 0, 0);
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

Graphics.ScaleTransform

   
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class MobyDick: Form
{
     public static void Main()
     {
          Application.Run(new MobyDick());
     }
     public MobyDick()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.ScaleTransform(1, 3);
          grfx.DrawString("abc", Font, new SolidBrush(clr), 
                          new Rectangle(0, 0, cx, cy));
     }
}

Graphics.SetClip

   
 
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class KeyholeClip: Form
{
     protected Image        image;
     protected GraphicsPath path;
   
     public static void Main()
     {
          Application.Run(new KeyholeClip());
     }
     public KeyholeClip()
     {
          ResizeRedraw = true;
          image = Image.FromFile("Color.jpg");
   
          path = new GraphicsPath();
          path.AddArc(80, 0, 80, 80, 45, -270);
          path.AddLine(70, 180, 170, 180);
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          pea.Graphics.SetClip(path);
          pea.Graphics.DrawImage(image, 0, 0, image.Width, image.Height);
     }      
}

Graphics.SetClip(path, (CombineMode)miCombineMode.Index)

  

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class ClippingCombinations: Form
{
     string   strCaption = "CombineMode = ";
     MenuItem miCombineMode;
   
     public static void Main()
     {
          Application.Run(new ClippingCombinations());
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }      
     public ClippingCombinations()
     {
          ResizeRedraw = true;
   
          Menu = new MainMenu();
          Menu.MenuItems.Add("&CombineMode");
   
          EventHandler ehClick = new EventHandler(MenuCombineModeOnClick);
          
          for (int i = 0; i < 6; i++)
          {
               MenuItem mi   = new MenuItem("&" + (CombineMode)i);
               mi.Click     += ehClick;
               mi.RadioCheck = true;
   
               Menu.MenuItems[0].MenuItems.Add(mi);
          }
          miCombineMode = Menu.MenuItems[0].MenuItems[0];
          miCombineMode.Checked = true;
     }
     void MenuCombineModeOnClick(object obj, EventArgs ea)
     {
          miCombineMode.Checked = false;
          miCombineMode = (MenuItem) obj;
          miCombineMode.Checked = true;
   
          Text = strCaption + (CombineMode)miCombineMode.Index;
          Invalidate();
     }
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          GraphicsPath path = new GraphicsPath();
          path.AddEllipse(0, 0, 2 * cx / 3, cy);
          grfx.SetClip(path);
   
          path.Reset();
          path.AddEllipse(cx / 3, 0, 2 * cx / 3, cy);
          grfx.SetClip(path, (CombineMode)miCombineMode.Index);
   
          grfx.FillRectangle(Brushes.Red, 0, 0, cx, cy);
     }
}

Graphics.SmoothingMode

  
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class AntiAlias: Form
{
     public static void Main()
     {
          Application.Run(new AntiAlias());
     }
     public AntiAlias()
     {
          Text = "Anti-Alias Demo";
          BackColor = SystemColors.Window;
          ForeColor = SystemColors.WindowText;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          Graphics grfx = pea.Graphics;
          Pen      pen  = new Pen(ForeColor);
   
          grfx.SmoothingMode   = SmoothingMode.None;
   
          grfx.DrawLine(pen, 2, 2, 18, 10);
     }
}

Graphics.TextRenderingHint

  
/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Drawing.Text;
namespace GDI_Basics
{
    /// <summary>
    /// Summary description for SmoothingFonts.
    /// </summary>
    public class SmoothingFonts : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.Label Label3;
        internal System.Windows.Forms.Label Label2;
        internal System.Windows.Forms.Label Label1;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public SmoothingFonts()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.Label3 = new System.Windows.Forms.Label();
            this.Label2 = new System.Windows.Forms.Label();
            this.Label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // Label3
            // 
            this.Label3.BackColor = System.Drawing.Color.White;
            this.Label3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.Label3.Location = new System.Drawing.Point(272, 168);
            this.Label3.Name = "Label3";
            this.Label3.Size = new System.Drawing.Size(128, 16);
            this.Label3.TabIndex = 5;
            this.Label3.Text = " ClearTypeGridFit";
            // 
            // Label2
            // 
            this.Label2.BackColor = System.Drawing.Color.White;
            this.Label2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.Label2.Location = new System.Drawing.Point(272, 100);
            this.Label2.Name = "Label2";
            this.Label2.Size = new System.Drawing.Size(128, 16);
            this.Label2.TabIndex = 4;
            this.Label2.Text = " AntiAliasGridFit";
            // 
            // Label1
            // 
            this.Label1.BackColor = System.Drawing.Color.White;
            this.Label1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.Label1.Location = new System.Drawing.Point(272, 36);
            this.Label1.Name = "Label1";
            this.Label1.Size = new System.Drawing.Size(128, 16);
            this.Label1.TabIndex = 3;
            this.Label1.Text = " SingleBitPerPixelGridFit";
            // 
            // SmoothingFonts
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
            this.ClientSize = new System.Drawing.Size(440, 314);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.Label3,
                                                                          this.Label2,
                                                                          this.Label1});
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Name = "SmoothingFonts";
            this.Text = "SmoothingFonts";
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.SmoothingFonts_Paint);
            this.ResumeLayout(false);
        }
        #endregion

        [STAThread]
        static void Main() 
        {
            Application.Run(new SmoothingFonts());
        }
        private void SmoothingFonts_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Font TextFont = new Font("Times New Roman", 25, FontStyle.Italic);
            e.Graphics.TextRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit;
            e.Graphics.DrawString("Sample Text", TextFont, Brushes.Black, 20, 20);
            e.Graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
            e.Graphics.DrawString("Sample Text", TextFont, Brushes.Black, 20, 85);
            e.Graphics.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
            e.Graphics.DrawString("Sample Text", TextFont, Brushes.Black, 20, 150);
        }
    }
}

Graphics.Transform

   
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class MobyDick: Form
{
     public static void Main()
     {
          Application.Run(new MobyDick());
     }
     public MobyDick()
     {
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.Transform = new Matrix(1, 1, -1, 1, 0, 0);
          grfx.DrawString("abc", Font, new SolidBrush(clr), 
                          new Rectangle(0, 0, cx, cy));
     }
}

Graphics.TranslateClip

   
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
class KeyholeClipCentered : Form {
    GraphicsPath path = new GraphicsPath();
    Image image = Image.FromFile("Color.jpg");
    public static void Main() {
        Application.Run(new KeyholeClipCentered());
    }
    public KeyholeClipCentered() {
        ResizeRedraw = true;
        path.AddArc(80, 0, 80, 80, 45, -270);
        path.AddLine(70, 180, 170, 180);
    }
    protected override void OnPaint(PaintEventArgs pea) {
        DoPage(pea.Graphics, ForeColor, ClientSize.Width, ClientSize.Height);
    }
    protected void DoPage(Graphics grfx, Color clr, int cx, int cy) {
        grfx.SetClip(path);
        RectangleF rectf = path.GetBounds();
        int xOffset = (int)((cx - rectf.Width) / 2 - rectf.X);
        int yOffset = (int)((cy - rectf.Height) / 2 - rectf.Y);
        grfx.TranslateClip(xOffset, yOffset);
        grfx.DrawImage(image, xOffset, yOffset, image.Width, image.Height);
    }
}

Graphics.TranslateTransform

   

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class RotatedRectangles: Form
{
     public static void Main()
     {
          Application.Run(new RotatedRectangles());
     }
     public RotatedRectangles()
     {
          Text = "Rotated Rectangles";
          ResizeRedraw = true; 
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Pen      pen   = new Pen(clr);
          grfx.PageUnit  = GraphicsUnit.Pixel;
          PointF[] aptf  = { (PointF) grfx.VisibleClipBounds.Size };
          grfx.PageUnit  = GraphicsUnit.Inch;
          grfx.PageScale = 0.01f;
   
          grfx.TransformPoints(CoordinateSpace.Page, 
                               CoordinateSpace.Device, aptf);
   
          grfx.TranslateTransform(aptf[0].X / 2, aptf[0].Y / 2);
          
          for (int i = 0; i < 6; i++)
          {
               grfx.DrawRectangle(pen, 0, 0, 200, 200);
               grfx.RotateTransform(10);
          }
     }
}

Graphics.VisibleClipBounds

  
using System;
using System.Drawing;
using System.Windows.Forms;
   
class DrawOnImage: Form
{
     Image  image = Image.FromFile("Color.jpg");
     string str = "www.nfex.ru";
   
     public static void Main()
     {
          Application.Run(new DrawOnImage());
     }
     public DrawOnImage()
     {
          ResizeRedraw = true; 
          Graphics grfxImage = Graphics.FromImage(image);
   
          grfxImage.PageUnit = GraphicsUnit.Inch;
          grfxImage.PageScale = 1;
   
          SizeF sizef = grfxImage.MeasureString(str, Font);
   
          grfxImage.DrawString(str, Font, Brushes.White, grfxImage.VisibleClipBounds.Width - sizef.Width, 0);
   
          grfxImage.Dispose();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }       
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          grfx.PageUnit = GraphicsUnit.Pixel;
          grfx.DrawImage(image, 0, 0);
          grfx.DrawString(str, Font, new SolidBrush(clr),
                    grfx.DpiX * image.Width / image.HorizontalResolution, 0);
     }
}