Csharp/C Sharp/2D Graphics/Animation

Animate Demo

/*
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;
namespace Animate_c
{
    public class AnimateDemo : System.Windows.Forms.Form
    {
    private System.Windows.Forms.Button cmdGo;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        /// 
    Bitmap RotatingBlocks;
    Point DrawHere;
    Rectangle InvalidRect;
    bool InProcess = false;
    private System.Windows.Forms.Button cmdStop;
        private System.ruponentModel.Container components = null;
        public AnimateDemo()
        {
          InitializeComponent();
    
          RotatingBlocks = new Bitmap("blocks.gif");
          DrawHere = new Point(10, 10);
          InvalidRect = new Rectangle(DrawHere, RotatingBlocks.Size);
    
          this.SetStyle(ControlStyles.AllPaintingInWmPaint,true);
          this.SetStyle(ControlStyles.DoubleBuffer,true);
          cmdStop.Enabled = false;
       }
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            RotatingBlocks.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.cmdGo = new System.Windows.Forms.Button();
      this.cmdStop = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // cmdGo
      // 
      this.cmdGo.Location = new System.Drawing.Point(160, 120);
      this.cmdGo.Name = "cmdGo";
      this.cmdGo.Size = new System.Drawing.Size(64, 32);
      this.cmdGo.TabIndex = 0;
      this.cmdGo.Text = "Animate";
      this.cmdGo.Click += new System.EventHandler(this.cmdGo_Click);
      // 
      // cmdStop
      // 
      this.cmdStop.Location = new System.Drawing.Point(240, 120);
      this.cmdStop.Name = "cmdStop";
      this.cmdStop.Size = new System.Drawing.Size(56, 32);
      this.cmdStop.TabIndex = 1;
      this.cmdStop.Text = "Stop";
      this.cmdStop.Click += new System.EventHandler(this.cmdStop_Click);
      // 
      // AnimateDemo
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(312, 157);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                  this.cmdStop,
                                                                  this.cmdGo});
      this.MaximizeBox = false;
      this.MinimizeBox = false;
      this.Name = "AnimateDemo";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "AnimateDemo";
      this.Load += new System.EventHandler(this.AnimateDemo_Load);
      this.ResumeLayout(false);
    }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new AnimateDemo());
        }
    private void AnimateDemo_Load(object sender, System.EventArgs e)
    {
    }
    private void OnFrameChanged(object o, EventArgs e) 
    {
      //Force a call to the Paint event handler.
      this.Invalidate(InvalidRect);
    }
    protected override void OnPaint(PaintEventArgs e) 
    {
      if ( !InProcess )
        return;
      
      //Get the next block ready to display.
      ImageAnimator.UpdateFrames(RotatingBlocks);
      //Draw the next frame in the RotatingBlocks animation.
      e.Graphics.DrawImage(RotatingBlocks, DrawHere);
    }
    private void cmdGo_Click(object sender, System.EventArgs e)
    {
      if (!InProcess) 
      {
        if ( ImageAnimator.CanAnimate(RotatingBlocks) )
        {
          //Begin the animation only once.
          ImageAnimator.Animate(RotatingBlocks, 
                                new EventHandler(this.OnFrameChanged));
          InProcess = true;
          cmdGo.Enabled = false;
          cmdStop.Enabled = true;
        }
      }
    }
    private void cmdStop_Click(object sender, System.EventArgs e)
    {
      ImageAnimator.StopAnimate(RotatingBlocks, 
                                new EventHandler(this.OnFrameChanged));
      InProcess = false;
      cmdGo.Enabled = true;
      cmdStop.Enabled = false;
    }
  }
}

<A href="http://www.nfex.ru/Code/CSharpDownload/Animate-c.zip">Animate-c.zip( 6 k)</a>

Animate Image

/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/
using System;
using System.Drawing;
using System.Windows.Forms;
namespace Animate_c
{
  public class animateImage : Form 
  {
    //Create a Bitmpap Object.
    Bitmap animatedImage = new Bitmap("1.gif");
    bool currentlyAnimating = false;
    //This method begins the animation.
    public void AnimateImage() 
    {
      if (!currentlyAnimating) 
      {
        //Begin the animation only once.
        ImageAnimator.Animate(animatedImage, new EventHandler(this.OnFrameChanged));
        currentlyAnimating = true;
      }
    }
    private void OnFrameChanged(object o, EventArgs e) 
    {
      //Force a call to the Paint event handler.
      this.Invalidate();
    }
    protected override void OnPaint(PaintEventArgs e) 
    {
      //Begin the animation.
      AnimateImage();
      //Get the next frame ready for rendering.
      ImageAnimator.UpdateFrames();
      //Draw the next frame in the animation.
      e.Graphics.DrawImage(this.animatedImage, new Point(0, 0));
    }
    public static void Main() 
    {
      Application.Run(new animateImage());
    }
  }
}

Animate Image with ImageAnimator

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
{
  private Bitmap bmp;
  
  public Form1()
  {
  }
  private void Form1_Load(object sender, EventArgs e)
  {
    bmp = new Bitmap("arrow.gif");
    ImageAnimator.Animate(bmp, new EventHandler(this.OnFrameChanged));
  }
  private void OnFrameChanged(object o, EventArgs e)
  {
    this.Invalidate();
  }
  private void Form1_Paint(object sender, PaintEventArgs e)
  {
    ImageAnimator.UpdateFrames();
    e.Graphics.DrawImage(this.bmp, new Point(0, 0));
  }
}

Animates a circle

using System;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
public class AnimateFace : Form {
  private int x = 10, y = 10;
  private int width = 200, height = 200;
  private Button suspend = new Button();
  private Button resume = new Button();
  private Button abort = new Button();
  private Thread t;
  public AnimateFace() {
    BackColor = Color.White;
    abort.Text = "Abort";
    suspend.Text = "Suspend";
    resume.Text = "Resume";
 
    Controls.Add(suspend);
    Controls.Add(resume);
    Controls.Add(abort);
    int w = 20;
    suspend.Location = new Point(w, 240);
    resume.Location = new Point(w += 10 + suspend.Width, 240);     
    abort.Location = new Point(w += 10 + resume.Width, 240);
    abort.Click += new EventHandler(Abort_Click);
    suspend.Click += new EventHandler(Suspend_Click);
    resume.Click += new EventHandler(Resume_Click);
    t = new Thread(new ThreadStart(Run));
    t.Start();
  }
  protected void Abort_Click(object sender, EventArgs e) {
    t.Abort();
  }
  protected void Suspend_Click(object sender, EventArgs e) {
    t.Suspend();
  }
  protected void Resume_Click(object sender, EventArgs e) {
    t.Resume();
  }
  protected override void OnPaint( PaintEventArgs e )   {
    Graphics g = e.Graphics;
    Pen green = new Pen(Color.Green, 3);  
    Brush red = new SolidBrush(Color.Red);
    g.DrawEllipse(green, x, y, width, height);
    base.OnPaint(e);
  }
  public void Run() {
    int dx=9, dy=9;
    while (true) {
      for (int i = 0; i < 30; i++) { 
        x += dx; 
        y += dy; 
        width -= dx; 
        height -= dy;
        Invalidate();
        Thread.Sleep(30);
      }
      dx = -dx; dy = -dy; 
    }
  }
  public static void Main( ) {
    Application.Run(new AnimateFace());
  }        
}

Animates an image

using System;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
public class AnimateImage : Form {
  private int width = 10;
  private int height = 10;
  Image pic = Image.FromFile("winter.jpg");
  private Button abort = new Button();
  Thread t;
  public AnimateImage() {
    abort.Text = "Abort";
    abort.Location = new Point(50, 230);
    abort.Click += new EventHandler(Abort_Click);
    Controls.Add(abort);
    SetStyle(ControlStyles.DoubleBuffer
           | ControlStyles.AllPaintingInWmPaint
           | ControlStyles.UserPaint, true);
           
    t = new Thread(new ThreadStart(Run));
    t.Start();
  }
  protected void Abort_Click(object sender, EventArgs e) {
    t.Abort();
  }
  
  protected override void OnPaint( PaintEventArgs e )   {
     Graphics g = e.Graphics;
     g.DrawRectangle(Pens.Black, 8, 8, width+3, height+3);
     g.DrawImage(pic, 10, 10, width, height);
     base.OnPaint(e);
  }
  
  public void Run() {
      int dx=5, dy=5;
      while (true) {
        for(int i = 0; i < 500; i++) {
          width += dx;
          height += dy;
          Invalidate();
          Thread.Sleep(30);
        }
        dx = -dx; dy = -dy; 
      }
  }
  public static void Main( ) {
      Application.Run(new AnimateImage());
  }         
}

Animation and double buffer

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
{
    private bool isShrinking = false;
    private int extraSize = 0;
    private System.Windows.Forms.Timer tmrRefresh;
    private System.Windows.Forms.CheckBox chkDoubleBuffer;
      public Form1() {
            InitializeComponent();
      tmrRefresh.Start();
      }
    private void tmrRefresh_Tick(object sender, System.EventArgs e)
    {
      if (isShrinking)
        extraSize--;
      else
        extraSize++;
      if (extraSize > 500)
        isShrinking = true;
      else if (extraSize < 1)
        isShrinking = false;
      this.Invalidate();
    }
    private void DoubleBuffering_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      this.DoubleBuffered = chkDoubleBuffer.Checked;
      Graphics g = e.Graphics;
      g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
      Pen drawingPen = new Pen(Color.Black, 10);
      g.FillRectangle(Brushes.White, new Rectangle(new Point(0, 0),
              this.ClientSize));
      g.DrawRectangle(drawingPen, 50, 50, 50 + extraSize, 50 + extraSize);
    }
    private void InitializeComponent()
    {
      this.tmrRefresh = new System.Windows.Forms.Timer(new System.ruponentModel.Container());
      this.chkDoubleBuffer = new System.Windows.Forms.CheckBox();
      this.SuspendLayout();
      // 
      // tmrRefresh
      // 
      this.tmrRefresh.Interval = 1;
      this.tmrRefresh.Tick += new System.EventHandler(this.tmrRefresh_Tick);
      // 
      // chkDoubleBuffer
      // 
      this.chkDoubleBuffer.BackColor = System.Drawing.Color.White;
      this.chkDoubleBuffer.Location = new System.Drawing.Point(12, 12);
      this.chkDoubleBuffer.Name = "chkDoubleBuffer";
      this.chkDoubleBuffer.Size = new System.Drawing.Size(336, 16);
      this.chkDoubleBuffer.TabIndex = 2;
      this.chkDoubleBuffer.Text = "Use Double Buffering";
      this.chkDoubleBuffer.UseVisualStyleBackColor = false;
      // 
      // DoubleBuffering
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(422, 373);
      this.Controls.Add(this.chkDoubleBuffer);
      this.Name = "DoubleBuffering";
      this.Text = "Form1";
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.DoubleBuffering_Paint);
      this.ResumeLayout(false);
    }
  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Button click action to move a ball

using System;
using System.Drawing;
using System.Windows.Forms;
public class ButtonToMove : Form {
  private int x = 50, y = 50;
  private Button move = new Button();
  public ButtonToMove() {
    move.Text = "Move";
    move.Location = new Point(5,5);
    Controls.Add(move);
    move.Click += new EventHandler(Move_Click);
  }    
  protected void Move_Click(object sender, EventArgs e) {
    x += 9;
    y += 9;
    Invalidate();
  }
  protected override void OnPaint( PaintEventArgs e )   {
    Graphics g = e.Graphics;
    Brush red = new SolidBrush(Color.Red);
    g.FillEllipse(red ,x ,y, 20 ,20);
    base.OnPaint(e);
  }
  public static void Main( ) {
    Application.Run(new ButtonToMove());
  }         
}

No Flicker (Flicker Free) Animation

/*
Code revised from chapter 9

GDI+ Custom Controls with Visual C# 2005
By Iulian Serban, Dragos Brezoi, Tiberiu Radu, Adam Ward 
Language English
Paperback 272 pages [191mm x 235mm]
Release date July 2006
ISBN 1904811604
Sample chapter
http://www.packtpub.ru/files/1604_CustomControls_SampleChapter.pdf

For More info on GDI+ Custom Control with Microsoft Visual C# book 
visit website www.packtpub.ru 

*/ 
using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace FlickerFree
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void tbInterval_Scroll(object sender, EventArgs e)
        {
            scrollingText.ScrollTimeInterval = tbInterval.Value;
        }
        private void tbAmount_Scroll(object sender, EventArgs e)
        {
            scrollingText.ScrollPixelAmount = tbAmount.Value;
        }
        
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.IContainer components = null;
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (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.scrollingText = new FlickerFree.ScrollingText();
            this.grpTrackerBars = new System.Windows.Forms.GroupBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.tbAmount = new System.Windows.Forms.TrackBar();
            this.tbInterval = new System.Windows.Forms.TrackBar();
            this.grpTrackerBars.SuspendLayout();
            ((System.ruponentModel.ISupportInitialize)(this.tbAmount)).BeginInit();
            ((System.ruponentModel.ISupportInitialize)(this.tbInterval)).BeginInit();
            this.SuspendLayout();
            // 
            // scrollingText
            // 
            this.scrollingText.BackColor = System.Drawing.Color.LightGray;
            this.scrollingText.Font = new System.Drawing.Font("Verdana", 26.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.scrollingText.ForeColor = System.Drawing.Color.Navy;
            this.scrollingText.Location = new System.Drawing.Point(38, 29);
            this.scrollingText.Margin = new System.Windows.Forms.Padding(12, 10, 12, 10);
            this.scrollingText.Name = "scrollingText";
            this.scrollingText.ScrollPixelAmount = 10;
            this.scrollingText.ScrollTimeInterval = 100;
            this.scrollingText.Size = new System.Drawing.Size(300, 80);
            this.scrollingText.TabIndex = 0;
            this.scrollingText.Text = "Scrolling Text that Scrolls";
            // 
            // grpTrackerBars
            // 
            this.grpTrackerBars.Controls.Add(this.tbInterval);
            this.grpTrackerBars.Controls.Add(this.tbAmount);
            this.grpTrackerBars.Controls.Add(this.label2);
            this.grpTrackerBars.Controls.Add(this.label1);
            this.grpTrackerBars.Location = new System.Drawing.Point(38, 132);
            this.grpTrackerBars.Name = "grpTrackerBars";
            this.grpTrackerBars.Size = new System.Drawing.Size(322, 183);
            this.grpTrackerBars.TabIndex = 1;
            this.grpTrackerBars.TabStop = false;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(7, 37);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(72, 13);
            this.label1.TabIndex = 0;
            this.label1.Text = "Scroll Amount";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(10, 134);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(71, 13);
            this.label2.TabIndex = 1;
            this.label2.Text = "Scroll Interval";
            // 
            // tbAmount
            // 
            this.tbAmount.Location = new System.Drawing.Point(101, 19);
            this.tbAmount.Maximum = 20;
            this.tbAmount.Name = "tbAmount";
            this.tbAmount.Size = new System.Drawing.Size(200, 45);
            this.tbAmount.TabIndex = 2;
            this.tbAmount.Value = 1;
            this.tbAmount.Scroll += new System.EventHandler(this.tbAmount_Scroll);
            // 
            // tbInterval
            // 
            this.tbInterval.Location = new System.Drawing.Point(101, 123);
            this.tbInterval.Maximum = 500;
            this.tbInterval.Minimum = 10;
            this.tbInterval.Name = "tbInterval";
            this.tbInterval.Size = new System.Drawing.Size(200, 45);
            this.tbInterval.TabIndex = 3;
            this.tbInterval.TickFrequency = 10;
            this.tbInterval.Value = 100;
            this.tbInterval.Scroll += new System.EventHandler(this.tbInterval_Scroll);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(456, 332);
            this.Controls.Add(this.grpTrackerBars);
            this.Controls.Add(this.scrollingText);
            this.Name = "Form1";
            this.Text = "Form1";
            this.grpTrackerBars.ResumeLayout(false);
            this.grpTrackerBars.PerformLayout();
            ((System.ruponentModel.ISupportInitialize)(this.tbAmount)).EndInit();
            ((System.ruponentModel.ISupportInitialize)(this.tbInterval)).EndInit();
            this.ResumeLayout(false);
        }
        #endregion
        private ScrollingText scrollingText;
        private System.Windows.Forms.GroupBox grpTrackerBars;
        private System.Windows.Forms.TrackBar tbInterval;
        private System.Windows.Forms.TrackBar tbAmount;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
        
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
     public partial class ScrollingText : UserControl
    {
        private string text;
        private int scrollAmount = 10;
        private int position = 10;
        public ScrollingText()
        {
            InitializeComponent();
        }
        private void ScrollingText_Load(object sender, EventArgs e)
        {
            this.ResizeRedraw = true;
            if (!this.DesignMode)
            {
                scrollTimer.Enabled = true;
            }
        }
        private void scrollTimer_Tick(object sender, EventArgs e)
        {
            position += scrollAmount;
            this.Invalidate();
        }
        [Browsable(true),DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
        public override string Text
        {
            get
            {
                return text;
            }
            set
            {
                text = value;
                this.Invalidate();
            }
        }
        public int ScrollTimeInterval
        {
            get
            {
                return scrollTimer.Interval;
            }
            set
            {
                scrollTimer.Interval = value;
            }
        }
        public int ScrollPixelAmount
        {
            get
            {
                return scrollAmount;
            }
            set
            {
                scrollAmount = value;
            }
        }
        private void ScrollingText_Paint(object sender, PaintEventArgs e)
        {
        }
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            // to avoid a design-time error we need to add the following line
            if (e.ClipRectangle.Width == 0)
            {
                return;
            }
            base.OnPaint(e);
            if (position > this.Width)
            {
                // Reset the text to scroll back onto the control.
                position = -(int)e.Graphics.MeasureString(text, this.Font).Width;
            }
            // Create the drawing area in memory.
            // Double buffering is used to prevent flicker.
            Bitmap bufl = new Bitmap(e.ClipRectangle.Width, e.ClipRectangle.Height);
            Graphics g = Graphics.FromImage(bufl);
            g.FillRectangle(new SolidBrush(this.BackColor), e.ClipRectangle);
            g.DrawString(text, this.Font, new SolidBrush(this.ForeColor), position, 0);
            // Render the finished image on the form.  
            e.Graphics.DrawImageUnscaled(bufl, 0, 0);
            g.Dispose();
        }
/// <summary> 
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.IContainer components = null;
        /// <summary> 
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }
        #region Component 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.ruponents = new System.ruponentModel.Container();
            this.scrollTimer = new System.Windows.Forms.Timer(this.ruponents);
            this.SuspendLayout();
            // 
            // scrollTimer
            // 
            this.scrollTimer.Tick += new System.EventHandler(this.scrollTimer_Tick);
            // 
            // ScrollingText
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.Name = "ScrollingText";
            this.Size = new System.Drawing.Size(400, 100);
            this.Load += new System.EventHandler(this.ScrollingText_Load);
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.ScrollingText_Paint);
            this.ResumeLayout(false);
        }
        #endregion
        internal System.Windows.Forms.Timer scrollTimer;
    }
}

Object collision

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
    private int dx = 4;
    private System.Windows.Forms.PictureBox picTarget;
    private System.Windows.Forms.PictureBox picBall;
    private System.Windows.Forms.Timer timer1;
    public Form1() {
        InitializeComponent();
    }
    private void InitializeComponent() {
      this.picTarget = new System.Windows.Forms.PictureBox();
      this.picBall = new System.Windows.Forms.PictureBox();
      this.timer1 = new System.Windows.Forms.Timer(new System.ruponentModel.Container());
      this.SuspendLayout();
      this.picTarget.BackColor = Color.Red;
      this.picTarget.Location = new System.Drawing.Point(160, 240);
      this.picTarget.Name = "picTarget";
      this.picTarget.Size = new System.Drawing.Size(56, 56);
      this.picTarget.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
      this.picTarget.TabIndex = 0;
      this.picTarget.TabStop = false;
      this.picBall.Image = new Bitmap("winter.jpg");
      this.picBall.Location = new System.Drawing.Point(24, 136);
      this.picBall.Name = "picBall";
      this.picBall.Size = new System.Drawing.Size(32, 32);
      this.picBall.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
      this.picBall.TabIndex = 1;
      this.picBall.TabStop = false;
      this.timer1.Enabled = true;
      this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.BackColor = System.Drawing.Color.White;
      this.ClientSize = new System.Drawing.Size(392, 341);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                  this.picBall,
                                                                  this.picTarget});
      this.Name = "Form1";
      this.Text = "Crasher";
      this.ResumeLayout(false);
    }
    [STAThread]
    static void Main() {
      Application.Run(new Form1());
    }
    private void timer1_Tick(object sender, System.EventArgs e) {
      int newX, newY;
      newX = picBall.Location.X + dx;
      newY = picBall.Location.Y + dx;
      
      if (newX > this.Width - picBall.Width){
        dx = - dx;
      } 
      
      if (newX < 0){
        dx = - dx;
      }
      
      if (picBall.Bounds.IntersectsWith(picTarget.Bounds)){
        this.BackColor = Color.Black;
      } else {
        this.BackColor = Color.White;
      }
      
      picBall.Location = new Point(newX, newY);
    }
}

Timer based animation

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{
    private System.ruponentModel.IContainer components;
  public Form1(){
    InitializeComponent();
  }

  #region Windows Form Designer generated code
  private void InitializeComponent(){
      this.ruponents = new System.ruponentModel.Container();
      this.timer1 = new System.Windows.Forms.Timer(this.ruponents);
      this.timer1.Enabled = true;
      this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
      this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
      this.ClientSize = new System.Drawing.Size(292, 260);
      this.Name = "Form1";
      this.Text = "LinearGradientBrush Demo";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
  #endregion
  static void Main(){
    Application.Run(new Form1());
  }
    private void Form1_Load(object sender, System.EventArgs e) {
      this.BackColor = Color.FromArgb(255, 0, 0, 255);  
    }
    private System.Windows.Forms.Timer timer1;
    private float angle = 0;
    private LinearGradientBrush GetBrush()
    {
      return new LinearGradientBrush(
        new Rectangle( 20, 20, 200, 100),
        Color.Orange,
        Color.Yellow,
        0.0F,
        true);
    }

    private void Rotate( Graphics graphics, LinearGradientBrush brush )
    {
      brush.RotateTransform(angle);
      brush.SetBlendTriangularShape(.5F);
      graphics.FillRectangle(brush, brush.Rectangle);
    }
    private void Rotate(Graphics graphics)
    {
      angle += 5 % 360;
      Rotate(graphics, GetBrush());
    }
    private void timer1_Tick(object sender, System.EventArgs e)
    {
      Rotate(CreateGraphics());
    }
    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Rotate(e.Graphics);
    }
}

Uses a thread to Animate a ball

using System;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
public class AnimateBall : Form {
  private int x, y;
  private Button suspend = new Button();
  private Button resume = new Button();
  private Button abort = new Button();
  Thread t;
  public AnimateBall() {
    BackColor = Color.White;
    abort.Text = "Abort";
    suspend.Text = "Suspend";
    resume.Text = "Resume";
    int w = 20;
    suspend.Location = new Point(w, 200);
    resume.Location = new Point(w += 10 + suspend.Width, 200);     
    abort.Location = new Point(w += 10 + resume.Width, 200);
    abort.Click += new EventHandler(Abort_Click);
    suspend.Click += new EventHandler(Suspend_Click);
    resume.Click += new EventHandler(Resume_Click);
    Controls.Add(suspend);
    Controls.Add(resume);
    Controls.Add(abort);
    t = new Thread(new ThreadStart(Run));
    t.Start();
  }
  protected void Abort_Click(object sender, EventArgs e) {
    t.Abort();
  }
  protected void Suspend_Click(object sender, EventArgs e) {
    t.Suspend();
  }
  protected void Resume_Click(object sender, EventArgs e) {
    t.Resume();
  }
  protected override void OnPaint( PaintEventArgs e )   {
    Graphics g = e.Graphics;
    g.FillEllipse(Brushes.Red, 100 ,y, 4 ,4);
    base.OnPaint(e);
  }
  public void Run() {
    int dx=2, dy=2;
    y = 1; 
    while (true) {
      for(int i=0; i<140; i++) {
        y+=dy;
        Invalidate();
        Thread.Sleep(10);
      }
      dx = -dx; dy = -dy; 
    }
  }
  public static void Main( ) {
    Application.Run(new AnimateBall());
  }         
}