Csharp/C Sharp/GUI Windows Form/Button

Add a Button

/*
C#: The Complete Reference 
by Herbert Schildt 
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Add a Button. 
 
using System; 
using System.Windows.Forms; 
using System.Drawing; 
 
public class ButtonForm : Form { 
  Button MyButton = new Button(); 
 
  public ButtonForm() { 
    Text = "Using a Button"; 
 
    MyButton = new Button(); 
    MyButton.Text = "Press Here"; 
    MyButton.Location = new Point(100, 200); 
 
    Controls.Add(MyButton); 
  }   
 
  [STAThread] 
  public static void Main() { 
    ButtonForm skel = new ButtonForm(); 
 
    Application.Run(skel); 
  } 
}

Add button to form

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa
Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
using System;
using System.Windows.Forms;
namespace Form
{
    public class ButtonclsForm : System.Windows.Forms.Form
    {
        private Button button1;
        public ButtonclsForm()
        {
            Text = "A Simple Form";
            button1 = new Button ();
//            SuspendLayout();
            button1.Text = "Cancel";
            button1.Name = "button1";
            button1.Size = new System.Drawing.Size (72, 30);
            button1.Location = new System.Drawing.Point ((ClientRectangle.Width - button1.Size.Width) / 2, ClientRectangle.Height - 35);
            Controls.AddRange(new System.Windows.Forms.Control[] {this.button1});
            button1.Click += new System.EventHandler(OnClickButton1);
//            ResumeLayout (false);
        }
        static public void Main() 
        {
            Application.Run(new ButtonclsForm());
        }
        void OnClickButton1 (object sender, System.EventArgs e)
        {
            Application.Exit ();
        }
    }
}

Add image to Button

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 System.Windows.Forms.Button button1;
  public Form1() {
        InitializeComponent();
  }
    private void InitializeComponent()
    {
        this.button1 = new System.Windows.Forms.Button();
        this.SuspendLayout();
        this.button1.Image = new Bitmap("winter.jpg");
        this.button1.ImageAlign = System.Drawing.ContentAlignment.TopRight;
        this.button1.Location = new System.Drawing.Point(12, 99);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(132, 74);
        this.button1.TabIndex = 1;
        this.button1.Text = "button1";
        this.button1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
        this.button1.UseVisualStyleBackColor = true;
 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(299, 271);
        this.Controls.Add(this.button1);
        this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        this.Name = "ImagesInCommonControls";
        this.Text = "ImagesInCommonControls";
        this.ResumeLayout(false);
    }
  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Add quotation char to Button text

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Form1 : Form
{
   [DllImport("User32.dll")]
   private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); 
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Label lbl;
  private System.Windows.Forms.Button cmdAsyncState;
  public Form1() {
        InitializeComponent();
  }
  private void Form1_KeyPress(object sender, KeyPressEventArgs e)
  {
    e.Handled = true;
  }
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
    lbl.Text = "Key Down: " + e.KeyValue.ToString();
    lbl.Text += "\nKey Code: " + e.KeyCode.ToString();
    lbl.Text += "\nKey Data: " + e.KeyData.ToString();
    if ((e.Modifiers & Keys.Shift) == Keys.Shift)
    {
      lbl.Text += "\n" + "Shift was held down.";
    }
    if ((e.Modifiers & Keys.Control) == Keys.Control)
    {
      lbl.Text += "\n" + "Control was held down.";
    }
    if (e.Alt)
    {
      lbl.Text += "\n" + "Alt was held down.";
    }
  }
  private void cmdAsyncState_Click(object sender, EventArgs e)
  {
    int state = Convert.ToInt32(GetAsyncKeyState(Keys.A).ToString());
    switch (state)
    {
      case 0:
        lbl.Text = "A has not been pressed since the last call.";
        break;
      case 1:
        lbl.Text = "A is not currently pressed, but has been pressed since the last call.";
          break;
      case -32767:
        lbl.Text = "A is currently pressed.";
        break;
    }
  }
  private void InitializeComponent()
  {
    this.textBox1 = new System.Windows.Forms.TextBox();
    this.lbl = new System.Windows.Forms.Label();
    this.cmdAsyncState = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // textBox1
    // 
    this.textBox1.Location = new System.Drawing.Point(36, 36);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new System.Drawing.Size(205, 21);
    this.textBox1.TabIndex = 0;
    this.textBox1.Text = "<Text will never appear here>";
    // 
    // lbl
    // 
    this.lbl.AutoSize = true;
    this.lbl.Location = new System.Drawing.Point(35, 77);
    this.lbl.Name = "lbl";
    this.lbl.Size = new System.Drawing.Size(0, 0);
    this.lbl.TabIndex = 1;
    // 
    // cmdAsyncState
    // 
    this.cmdAsyncState.Location = new System.Drawing.Point(36, 202);
    this.cmdAsyncState.Name = "cmdAsyncState";
    this.cmdAsyncState.Size = new System.Drawing.Size(141, 24);
    this.cmdAsyncState.TabIndex = 2;
    this.cmdAsyncState.Text = "GetAsyncState() for \"A\"";
    this.cmdAsyncState.Click += new System.EventHandler(this.cmdAsyncState_Click);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.Add(this.cmdAsyncState);
    this.Controls.Add(this.lbl);
    this.Controls.Add(this.textBox1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.KeyPreview = true;
    this.Name = "Form1";
    this.Text = "KeyTest";
    this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
    this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
    this.ResumeLayout(false);
    this.PerformLayout();
  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Add two action listeners to a button

using System;
using System.Windows.Forms;
public class MyForm : Form{
  void btn1_onclick(object sender, EventArgs e)
  {
    Text = "Sender: " + sender.ToString() + " - Event: " + e.ToString();
  }
  void btn1_onclick2(object sender, EventArgs e){
    Console.WriteLine(String.Format("Sender: {0} - Event: {1}", sender.ToString(), e.ToString()));
  }
  public MyForm() {
    Text = "Hello World";
    Button btn1 = new Button();
    btn1.Text = "Click Me";
    this.Controls.Add(btn1);
    btn1.Click += new EventHandler(btn1_onclick);
    btn1.Click += new EventHandler(btn1_onclick2);
  }
  public static void Main()
  {
    Application.Run(new MyForm());
  }
}

Button Action Demo

using System;
using System.Drawing;
using System.Windows.Forms;
public class ButtonActionDemo : Form {
    Label label1  = new Label();
    TextBox textBox1 = new TextBox();
    Button button1 = new Button();
    Label label2 = new Label();
    
    public ButtonActionDemo() {
      label1.Location = new Point(56, 48);
      label1.Name = "label1";
      label1.TabIndex = 0;
      label1.Text = "Enter Ur Name : ";
    
      textBox1.Location = new Point(176, 48);
      textBox1.Name = "textBox1";
      textBox1.Size = new Size(112, 20);
      textBox1.Text = "";
    
      button1.Location = new Point(128, 104);
      button1.Name = "button1";
      button1.Text = "Click Me";
    
      label2.Location = new Point(88, 192);
      label2.Name = "label2";
    
      button1.Click += new System.EventHandler(button1_Click1a);
    
      //Controls.AddRange(new Control[]
      //{label2, button1, textBox1, label1});
      //Instead of this u can use the Following
    
      Controls.Add(label2);
      Controls.Add(label1);
      Controls.Add(button1);
      Controls.Add(textBox1);
    }
    static void Main()
    {
      Application.Run(new ButtonActionDemo());
    }
    private void button1_Click1a(object sender, System.EventArgs e)
    {
      label2.Text = "Thanks a Lot ";
    }
}

Button click action

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa
Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace AddControls
{
  /// <summary>
  /// Summary description for FormAddControls.
  /// </summary>
  public class FormAddControls : System.Windows.Forms.Form
  {
    private System.Windows.Forms.ListBox listBox1;
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.Button button2;
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ruponentModel.Container components = null;
    public FormAddControls()
    {
      //
      // 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.textBox1 = new System.Windows.Forms.TextBox();
      this.button1 = new System.Windows.Forms.Button();
      this.button2 = new System.Windows.Forms.Button();
      this.listBox1 = new System.Windows.Forms.ListBox();
      this.SuspendLayout();
      // 
      // textBox1
      // 
      this.textBox1.Location = new System.Drawing.Point(38, 200);
      this.textBox1.Name = "textBox1";
      this.textBox1.Size = new System.Drawing.Size(216, 20);
      this.textBox1.TabIndex = 1;
      this.textBox1.Text = "";
      // 
      // button1
      // 
      this.button1.Location = new System.Drawing.Point(48, 240);
      this.button1.Name = "button1";
      this.button1.Size = new System.Drawing.Size(80, 24);
      this.button1.TabIndex = 2;
      this.button1.Text = "Add Item";
      this.button1.Click += new System.EventHandler(this.button1_Click);
      this.button1.MouseEnter += new System.EventHandler(this.Buttons_OnMouseEnter);
      this.button1.MouseLeave += new System.EventHandler(this.Buttons_OnMouseLeave);
      // 
      // button2
      // 
      this.button2.Location = new System.Drawing.Point(160, 240);
      this.button2.Name = "button2";
      this.button2.Size = new System.Drawing.Size(96, 24);
      this.button2.TabIndex = 3;
      this.button2.Text = "Cancel";
      this.button2.Click += new System.EventHandler(this.button2_Click);
      this.button2.MouseEnter += new System.EventHandler(this.Buttons_OnMouseEnter);
      this.button2.MouseLeave += new System.EventHandler(this.Buttons_OnMouseLeave);
      // 
      // listBox1
      // 
      this.listBox1.Location = new System.Drawing.Point(38, 32);
      this.listBox1.Name = "listBox1";
      this.listBox1.Size = new System.Drawing.Size(216, 147);
      this.listBox1.TabIndex = 0;
      // 
      // FormAddControls
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.button2,
                                      this.button1,
                                      this.textBox1,
                                      this.listBox1});
      this.Name = "FormAddControls";
      this.Text = "FormAddControls";
      this.ResumeLayout(false);
    }
    #endregion
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new FormAddControls());
    }
    private void button1_Click(object sender, System.EventArgs e)
    {
      if (textBox1.Text == "")
        return;
      string strAdd = textBox1.Text;
      if (listBox1.FindString (strAdd, -1) < 0)
      {
        listBox1.Items.Add (strAdd);
        textBox1.Text = "";
        textBox1.Focus ();
        return;
      }
      MessageBox.Show ("\"" + strAdd + "\" is already in the list box", "Duplicate");
    }
    private void button2_Click(object sender, System.EventArgs e)
    {
      Application.Exit();
    }
    private void Buttons_OnMouseEnter(object sender, System.EventArgs e)
    {
      Button btn = (Button) sender;
      btn.BackColor = Color.LightGray;
    }
    private void Buttons_OnMouseLeave(object sender, System.EventArgs e)
    {
      Button btn = (Button) sender;
      btn.BackColor = SystemColors.Control;
    }
  }
}

Button FlatStyle Styles

 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class ButtonStyles: Form
{
     public static void Main()
     {
          Application.Run(new ButtonStyles());
     }
     public ButtonStyles()
     {
          int y = 0;
   
          foreach (FlatStyle fs in Enum.GetValues(typeof(FlatStyle)))
          {
               Button btn    = new Button();
               btn.Parent    = this;
               btn.FlatStyle = fs;
               btn.Text      = fs.ToString();
               btn.Location  = new Point(50, y += 50);
          }
     }
}

Button Generator

/*
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.Data;
namespace ButtonGenerator
{
    /// <summary>
    /// Summary description for ButtonGenerator.
    /// </summary>
    public class ButtonGenerator : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.GroupBox GroupBox2;
        internal System.Windows.Forms.GroupBox GroupBox1;
        internal System.Windows.Forms.Label Label1;
        internal System.Windows.Forms.TextBox txtLeft;
        internal System.Windows.Forms.Label Label2;
        internal System.Windows.Forms.Button cmdCreate;
        internal System.Windows.Forms.TextBox txtTop;
        internal System.Windows.Forms.StatusBar status;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public ButtonGenerator()
        {
            //
            // 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.GroupBox2 = new System.Windows.Forms.GroupBox();
            this.GroupBox1 = new System.Windows.Forms.GroupBox();
            this.Label1 = new System.Windows.Forms.Label();
            this.txtLeft = new System.Windows.Forms.TextBox();
            this.Label2 = new System.Windows.Forms.Label();
            this.cmdCreate = new System.Windows.Forms.Button();
            this.txtTop = new System.Windows.Forms.TextBox();
            this.status = new System.Windows.Forms.StatusBar();
            this.GroupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // GroupBox2
            // 
            this.GroupBox2.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.GroupBox2.Location = new System.Drawing.Point(0, 180);
            this.GroupBox2.Name = "GroupBox2";
            this.GroupBox2.Size = new System.Drawing.Size(368, 4);
            this.GroupBox2.TabIndex = 10;
            this.GroupBox2.TabStop = false;
            // 
            // GroupBox1
            // 
            this.GroupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                    this.Label1,
                                                                                    this.txtLeft,
                                                                                    this.Label2,
                                                                                    this.cmdCreate,
                                                                                    this.txtTop});
            this.GroupBox1.Location = new System.Drawing.Point(12, 6);
            this.GroupBox1.Name = "GroupBox1";
            this.GroupBox1.Size = new System.Drawing.Size(168, 128);
            this.GroupBox1.TabIndex = 9;
            this.GroupBox1.TabStop = false;
            // 
            // Label1
            // 
            this.Label1.Location = new System.Drawing.Point(16, 52);
            this.Label1.Name = "Label1";
            this.Label1.Size = new System.Drawing.Size(52, 16);
            this.Label1.TabIndex = 0;
            this.Label1.Text = "Left:";
            // 
            // txtLeft
            // 
            this.txtLeft.Location = new System.Drawing.Point(76, 52);
            this.txtLeft.Name = "txtLeft";
            this.txtLeft.Size = new System.Drawing.Size(68, 21);
            this.txtLeft.TabIndex = 4;
            this.txtLeft.Text = "200";
            // 
            // Label2
            // 
            this.Label2.Location = new System.Drawing.Point(16, 24);
            this.Label2.Name = "Label2";
            this.Label2.Size = new System.Drawing.Size(52, 16);
            this.Label2.TabIndex = 1;
            this.Label2.Text = "Top:";
            // 
            // cmdCreate
            // 
            this.cmdCreate.FlatStyle = System.Windows.Forms.FlatStyle.System;
            this.cmdCreate.Location = new System.Drawing.Point(36, 84);
            this.cmdCreate.Name = "cmdCreate";
            this.cmdCreate.Size = new System.Drawing.Size(112, 28);
            this.cmdCreate.TabIndex = 2;
            this.cmdCreate.Text = "Create Button";
            this.cmdCreate.Click += new System.EventHandler(this.cmdCreate_Click);
            // 
            // txtTop
            // 
            this.txtTop.Location = new System.Drawing.Point(76, 24);
            this.txtTop.Name = "txtTop";
            this.txtTop.Size = new System.Drawing.Size(68, 21);
            this.txtTop.TabIndex = 3;
            this.txtTop.Text = "50";
            // 
            // status
            // 
            this.status.Location = new System.Drawing.Point(0, 184);
            this.status.Name = "status";
            this.status.Size = new System.Drawing.Size(372, 22);
            this.status.TabIndex = 8;
            // 
            // ButtonGenerator
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
            this.ClientSize = new System.Drawing.Size(372, 206);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.GroupBox2,
                                                                          this.GroupBox1,
                                                                          this.status});
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Name = "ButtonGenerator";
            this.Text = "Button Generator";
            this.GroupBox1.ResumeLayout(false);
            this.ResumeLayout(false);
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new ButtonGenerator());
        }
        private int buttonCount = 0;
        private void cmdCreate_Click(object sender, System.EventArgs e)
        {
            buttonCount++;
            // Create the button.
            Button newButton = new Button();
            newButton.Text = "Button " + buttonCount.ToString();
            newButton.Left = int.Parse(txtLeft.Text);
            newButton.Top = int.Parse(txtTop.Text);
            // Attach the event handler.
            newButton.Click += new EventHandler(ButtonHandler);
            this.Controls.Add(newButton);
        }

        private void ButtonHandler(object sender, System.EventArgs e)
        {
            status.Text = " You clicked ... ";
            status.Text += ((Button)sender).Text;
        }
    }
}

Button Image, Size, Parent

 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class BitmapButtons: Form
{
     int    cxBtn, cyBtn, dxBtn;
     Button btnLarger, btnSmaller;
   
     public static void Main()
     {
          Application.Run(new BitmapButtons());
     }
     public BitmapButtons()
     {
          ResizeRedraw = true;
   
          dxBtn = Font.Height;
          btnLarger = new Button();
          btnLarger.Parent = this;
          btnLarger.Image  = new Bitmap(GetType(), "LargerButton.bmp") ;
   
          cxBtn = btnLarger.Image.Width  + 8;
          cyBtn = btnLarger.Image.Height + 8;
   
          btnLarger.Size   = new Size(cxBtn, cyBtn);
          btnLarger.Click += new EventHandler(ButtonLargerOnClick);
   
          btnSmaller = new Button();
          btnSmaller.Parent = this;
          btnSmaller.Image  = new Bitmap(GetType(), "SmallerButton.bmp");
          btnSmaller.Size   = new Size(cxBtn, cyBtn);
          btnSmaller.Click += new EventHandler(ButtonSmallerOnClick);
   
          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)
     {
          Left   = 50;
          Top    = 50;
          Width  = 50;
          Height = 50;
     }
     void ButtonSmallerOnClick(object obj, EventArgs ea)
     {
          Left   = 200;
          Top    = 200;
          Width  = 20;
          Height = 20;
     }
}

Button Localtion

 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class SimpleButton: Form
{
     public static void Main()
     {
          Application.Run(new SimpleButton());
     }
     public SimpleButton()
     {
          Text = "Simple Button";
   
          Button btn   = new Button();
          btn.Parent   = this;
          btn.Text     = "Click Me!";
          btn.Location = new Point(100, 100);
          btn.Click   += new EventHandler(ButtonOnClick);
     }
     void ButtonOnClick(object obj, EventArgs ea)
     {
          Graphics grfx   = CreateGraphics();
          Point    ptText = Point.Empty;
          string   str    = "Button clicked!";
   
          grfx.DrawString(str, Font, new SolidBrush(ForeColor), ptText);
          grfx.Dispose();
     }
}

Button Name, TabIndex, Text

 
using System;
using System.Windows.Forms;
class MainForm : Form
{
    private Label label1;
    private TextBox textBox1;
    private Button button1;
    public MainForm()
    {
         this.label1 = new Label();
         this.textBox1 = new TextBox();
         this.button1 = new Button();
         this.SuspendLayout();
         this.label1.Location = new System.Drawing.Point(16, 36);
         this.label1.Name = "label1";
         this.label1.Size = new System.Drawing.Size(128, 16);
         this.label1.TabIndex = 0;
         this.label1.Text = "Please enter your name:"; 
         this.textBox1.Location = new System.Drawing.Point(152, 32);
         this.textBox1.Name = "textBox1";
         this.textBox1.TabIndex = 1;
         this.textBox1.Text = "";
         this.button1.Location = new System.Drawing.Point(109, 80);
         this.button1.Name = "button1";
         this.button1.TabIndex = 2;
         this.button1.Text = "Enter";
         this.button1.Click += new System.EventHandler(this.button1_Click);
         this.ClientSize = new System.Drawing.Size(292, 126);
         this.Controls.Add(this.button1);
         this.Controls.Add(this.textBox1);
         this.Controls.Add(this.label1);
         this.Name = "form1";
         this.Text = "Visual C#";
         this.ResumeLayout(false);
     }
     private void button1_Click(object sender, System.EventArgs e)
     {
        System.Console.WriteLine("User entered: " + textBox1.Text);
        MessageBox.Show("Welcome, " + textBox1.Text, "Visual C#");
     }
     [STAThread]
     public static void Main()
     {
        Application.EnableVisualStyles();
        Application.Run(new MainForm());
     }
}

Change Button text

using System;
using System.Windows.Forms;
using System.Drawing;
public class PushMe2 : Form {
  Button pushMeButton;
  public PushMe2() {
    pushMeButton = new Button(); 
    pushMeButton.Text = "Push Me";
    pushMeButton.Height = 60;
    pushMeButton.Width = 80;
    pushMeButton.Top = 60;
    pushMeButton.Left = 60;
    pushMeButton.Click += new EventHandler(ButtonClicked);
    this.Controls.Add(pushMeButton);
    this.Height = 200;
    this.Width = 200;
    this.StartPosition = FormStartPosition.CenterScreen;
    this.Visible = true;
  }
  public void ButtonClicked(object source, EventArgs e) {
    Button b = (Button)source;
    if ( b.Text == "Push Me" ) {
      b.Text = "Ouch";
    }
    else {
      b.Text = "Push Me";
    }
  }
  static void Main() {
    Application.Run(new PushMe2());
  }
}

Change Standard Button Text Alignment

    using System;
  using System.Drawing;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  public class ButtonForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Button btnImage;
    private System.Windows.Forms.Button btnStandard;
    private System.Windows.Forms.Button btnPopup;
    private System.Windows.Forms.Button btnFlat;
    // Hold the current text alignment
    ContentAlignment currAlignment = ContentAlignment.MiddleCenter;
    int currEnumPos = 0;
    
    public ButtonForm()
    {
      InitializeComponent();
      // Set btnStandard as default accept.
      this.AcceptButton = btnStandard;
      CenterToScreen();
    }
    private void InitializeComponent()
    {
      this.btnStandard = new System.Windows.Forms.Button();
      this.btnFlat = new System.Windows.Forms.Button();
      this.btnImage = new System.Windows.Forms.Button();
      this.btnPopup = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // btnStandard
      // 
      this.btnStandard.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
      this.btnStandard.ForeColor = System.Drawing.SystemColors.ControlText;
      this.btnStandard.Location = new System.Drawing.Point(16, 80);
      this.btnStandard.Name = "btnStandard";
      this.btnStandard.Size = new System.Drawing.Size(312, 88);
      this.btnStandard.TabIndex = 2;
      this.btnStandard.Text = "I am a standard button";
      this.btnStandard.Click += new System.EventHandler(this.btnStandard_Click);
      // 
      // btnFlat
      // 
      this.btnFlat.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
      this.btnFlat.ForeColor = System.Drawing.Color.Blue;
      this.btnFlat.Location = new System.Drawing.Point(16, 24);
      this.btnFlat.Name = "btnFlat";
      this.btnFlat.Size = new System.Drawing.Size(152, 32);
      this.btnFlat.TabIndex = 0;
      this.btnFlat.Text = "I am flat...";
      // 
      // btnImage
      // 
      this.btnImage.Font = new System.Drawing.Font("Microsoft Sans Serif", 20F, System.Drawing.FontStyle.Bold);
      this.btnImage.Image = new Bitmap("winter.jpg");
      this.btnImage.Location = new System.Drawing.Point(16, 192);
      this.btnImage.Name = "btnImage";
      this.btnImage.Size = new System.Drawing.Size(312, 72);
      this.btnImage.TabIndex = 3;
      this.btnImage.Text = "Image Button";
      this.btnImage.TextAlign = System.Drawing.ContentAlignment.TopCenter;
      // 
      // btnPopup
      // 
      this.btnPopup.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
      this.btnPopup.ForeColor = System.Drawing.SystemColors.ControlText;
      this.btnPopup.Location = new System.Drawing.Point(176, 24);
      this.btnPopup.Name = "btnPopup";
      this.btnPopup.Size = new System.Drawing.Size(152, 32);
      this.btnPopup.TabIndex = 1;
      this.btnPopup.Text = "I am a Popup!";
      // 
      // ButtonForm
      // 
      this.AcceptButton = this.btnStandard;
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(340, 269);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.btnImage,
                                      this.btnStandard,
                                      this.btnPopup,
                                      this.btnFlat});
      this.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
      this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
      this.Name = "ButtonForm";
      this.Text = "Buttons";
      this.ResumeLayout(false);
    }
    
    protected void btnStandard_Click (object sender, System.EventArgs e)
    {      
      Array values = Enum.GetValues(currAlignment.GetType());
    
      currEnumPos++;
      if(currEnumPos >= values.Length)
        currEnumPos = 0;
      
      currAlignment = (ContentAlignment)ContentAlignment.Parse(currAlignment.GetType(), 
              values.GetValue(currEnumPos).ToString());
      btnStandard.TextAlign = currAlignment;
      btnStandard.Text = currAlignment.ToString();
    }
    public static void Main(string[] args) 
    {
      Application.Run(new ButtonForm());
    }
  }

Handle button messages

/*
C#: The Complete Reference 
by Herbert Schildt 
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Handle button messages. 
 
using System; 
using System.Windows.Forms; 
using System.Drawing; 
 
public class ButtonForm1 : Form { 
  Button MyButton = new Button(); 
 
  public ButtonForm1() { 
    Text = "Respond to a Button"; 
 
    MyButton = new Button(); 
    MyButton.Text = "Press Here"; 
    MyButton.Location = new Point(100, 200); 
 
    // Add button event handler to list. 
    MyButton.Click += new EventHandler(MyButtonClick); 
 
    Controls.Add(MyButton); 
  }   
 
  [STAThread] 
  public static void Main() { 
    ButtonForm1 skel = new ButtonForm1(); 
 
    Application.Run(skel); 
  } 
 
  // Handler for MyButton. 
  protected void MyButtonClick(object who, EventArgs e) { 
 
    if(MyButton.Top == 200) 
      MyButton.Location = new Point(10, 10); 
    else 
      MyButton.Location = new Point(100, 200); 
  } 
}

Hot Track Button Host

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System.ruponentModel;
using System.Drawing;
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace HotTrackButtonHost
{
    /// <summary>
    /// Summary description for HotTrackButtonHost.
    /// </summary>
    public class HotTrackButtonHost : System.Windows.Forms.Form
    {
        private HotTrackButton hotTrackButton1;
        internal HotTrackButton hotTrackButton2;
        internal HotTrackButton HotTrackButton3;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public HotTrackButtonHost()
        {
            //
            // 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()
        {
//            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(HotTrackButtonHost));
            this.hotTrackButton1 = new HotTrackButton();
            this.hotTrackButton2 = new HotTrackButton();
            this.HotTrackButton3 = new HotTrackButton();
            this.SuspendLayout();
            // 
            // hotTrackButton1
            // 
//            this.hotTrackButton1.Image = ((System.Drawing.Bitmap)(resources.GetObject("hotTrackButton1.Image")));
            this.hotTrackButton1.Location = new System.Drawing.Point(28, 128);
            this.hotTrackButton1.Name = "hotTrackButton1";
            this.hotTrackButton1.Size = new System.Drawing.Size(168, 36);
            this.hotTrackButton1.TabIndex = 0;
            this.hotTrackButton1.Text = "Large HotTrackButton";
            // 
            // hotTrackButton2
            // 
            this.hotTrackButton2.BackColor = System.Drawing.SystemColors.Control;
            this.hotTrackButton2.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.hotTrackButton2.ForeColor = System.Drawing.Color.Black;
//            this.hotTrackButton2.Image = ((System.Drawing.Bitmap)(resources.GetObject("hotTrackButton2.Image")));
            this.hotTrackButton2.Location = new System.Drawing.Point(32, 24);
            this.hotTrackButton2.Name = "hotTrackButton2";
            this.hotTrackButton2.Size = new System.Drawing.Size(168, 20);
            this.hotTrackButton2.TabIndex = 1;
            this.hotTrackButton2.Text = "Ordinary HotTrackButton";
            // 
            // HotTrackButton3
            // 
            this.HotTrackButton3.BackColor = System.Drawing.SystemColors.Control;
            this.HotTrackButton3.Enabled = false;
            this.HotTrackButton3.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.HotTrackButton3.ForeColor = System.Drawing.Color.Black;
//            this.HotTrackButton3.Image = ((System.Drawing.Bitmap)(resources.GetObject("HotTrackButton3.Image")));
            this.HotTrackButton3.Location = new System.Drawing.Point(32, 68);
            this.HotTrackButton3.Name = "HotTrackButton3";
            this.HotTrackButton3.Size = new System.Drawing.Size(168, 28);
            this.HotTrackButton3.TabIndex = 3;
            this.HotTrackButton3.Text = "Disabled HotTrackButton";
            // 
            // HotTrackButtonHost
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.HotTrackButton3,
                                                                          this.hotTrackButton2,
                                                                          this.hotTrackButton1});
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Name = "HotTrackButtonHost";
            this.Text = "HotTrackButtonHost";
            this.ResumeLayout(false);
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new HotTrackButtonHost());
        }
    }
    /// <summary>
    /// Summary description for HotTrackButton.
    /// </summary>
    public class HotTrackButton : Control
    {
        /// <summary> 
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public HotTrackButton()
        {
            // This call is required by the Windows.Forms Form Designer.
            InitializeComponent();
            // TODO: Add any initialization after the InitForm 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 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()
        {
            components = new System.ruponentModel.Container();
        }
        #endregion

        public enum State
        {
            Normal,
            MouseOver,
            Pushed
        }
        private State state = State.Normal;
        private Image image;
        private Rectangle bounds;
        public Image Image
        {
            get
            {
                return image;
            }
            set
            {
                image = value;
                bounds = new Rectangle(0, 0, image.Width + 5, image.Height + 5);
                this.Invalidate();
            }
        }
        // You must override this property to invalidate the display and
        // provide automatic refresh when the property is changed.
        public override string Text
        {
            get
            {
                return base.Text;
            }
            set
            {
                base.Text = value;
                this.Invalidate();
            }
        }
        protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
        {
            base.OnMouseMove(e);
            // Check if the mouse pointer is over the button.
            // If the mouse moves off the button surface, it will be deactivated,
            // even if the button is being held in a pressed position.
            // The code repaints the button only if needed.
            if (bounds.Contains(e.X, e.Y))
            {
                if (state == State.Normal)
                {
                    state = State.MouseOver;
                    this.Invalidate(bounds);
                }
            }
            else
            {
                if (state != State.Normal)
                {
                    state = State.Normal;
                    this.Invalidate(bounds);
                }
            }
        }
        protected override void OnMouseLeave(System.EventArgs e)
        {
            // Reset the button appearance. This will also deactivate the button
            // if it has been pressed but not released.
            // The code repaints the button only if needed.
            if (state != State.Normal)
            {
                state = State.Normal;
                this.Invalidate(bounds);
            }
        }
        protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
        {
            // Change the button to a pushed state, provided the mouse pointer is
            // over the image and the Left mouse button has been clicked 
            if (bounds.Contains(e.X, e.Y) && 
                (e.Button & MouseButtons.Left) == MouseButtons.Left)
            {
                state = State.Pushed;
                this.Invalidate(bounds);
            }
        }
        protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
        {
            // Change the button to a normal state and repaint if needed.
            if (!((e.Button & MouseButtons.Left) == MouseButtons.Left))
            {
                state = State.Normal;
                if (bounds.Contains(e.X, e.Y))
                {
                    state = State.MouseOver;
                    }
                else
                {
                    state = State.Normal;
                }
                this.Invalidate(bounds);
            }
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            if (image == null)
            {
                // Draw the text without the image.
                e.Graphics.DrawString(this.Text, this.Font,
                    new SolidBrush(this.ForeColor), 10, 0);
            }
            else
            {
                if (!this.Enabled)
                {
                    // Paint the picture in a disabled state.
                    ControlPaint.DrawImageDisabled(e.Graphics, image, 2, 2,
                        this.BackColor);
                }
                else
                {
                    // Paint the image according to the button state.
                    switch (state)
                    {
                        case State.Normal:
                            e.Graphics.DrawImage(image, 2, 2);
                            break;
                        case State.MouseOver:
                            ControlPaint.DrawBorder3D(e.Graphics, bounds, 
                                Border3DStyle.Raised, Border3DSide.All);
                            e.Graphics.DrawImage(image, 2, 2);
                            break;
                        case State.Pushed:
                            ControlPaint.DrawBorder3D(e.Graphics, bounds, 
                                Border3DStyle.Sunken, Border3DSide.All);
                            e.Graphics.DrawImage(image, 3, 3);
                            break;
                    }
                }
                // Paint the caption text next to the image.
                e.Graphics.DrawString(this.Text, this.Font,
                    new SolidBrush(this.ForeColor), bounds.Width + 3,
                    (bounds.Height - this.Font.Height) / 2);
            }
        }
        protected override void OnClick(System.EventArgs e)
        {
            // Only propagate the click to the client if it was detected over the image.
            if (state == State.Pushed)
            {
                base.OnClick(e);
            }
        }

    }
    
}

Paint Owner-Draw Buttons

 

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);
          }
     }     
    
}

Picture Button

/*
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
*/
namespace MyButton
{
  using System.Runtime.InteropServices ;
  using System;
  using System.Windows.Forms;
  using System.Drawing;
  /// <summary>
  ///    Summary description for SMKPictureButton
  /// </summary>
  
  public class SMKPictureButton : System.Windows.Forms.ButtonBase
  {
    // Import the CreateRoundRectRgn function from the GDI32.DLL 
    // From the Unmanaged Code
    [DllImport("GDI32.DLL",EntryPoint="CreateRoundRectRgn")]
    private static extern int CreateRoundRectRgn(int x1 , int y1 ,int x2 , int y2 , int x3 , int y3);
    // Import the CreateRectRgn function from the GDI32.DLL 
    // From the Unmanaged Code
    [DllImport("GDI32.DLL",EntryPoint="CreateRectRgn")]
    private static extern int CreateRectRgn(int x1 , int y1 ,int x2 , int y2 );
    // Import the SetWindowRgn function from the user32.DLL
    // From the Unmanaged Code
    [DllImport("user32.DLL",EntryPoint="SetWindowRgn")]
    private static extern int SetWindowRgn( int hWnd , int hRgn , int bRedraw ) ;

    Font f1 = new System.Drawing.Font("System", 10.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    Font f2 = new System.Drawing.Font("Microsoft Sans Serif", 10.25F, System.Drawing.FontStyle.Italic|System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    Font f3 = new System.Drawing.Font("Courier", 10F, System.Drawing.FontStyle.Regular|System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    
    int rg ;
    int hdl ;
    public SMKPictureButton()
    {
    }
    protected override void OnMouseDown ( MouseEventArgs mevent)
    {
      // Override the MouseDown function to set a new image
      // Display Image No 1 from ButtonImageList when mouse is clicked on the button
      ImageIndex = 1;
      Text = "SMILING FACE (MOUSE DOWN)" ;
      Font = f1 ;
      Invalidate();
    }
    
    protected override void OnMouseLeave (EventArgs e)
    {
      // Override the MouseLeave function to set a new image
      // Display Image No 2 from ButtonImageList when mouse leaves the button
      ImageIndex = 2;
      Text = "HAPPY FACE (MOUSE LEAVE)" ;
      Font = f2 ;
      Invalidate();
    }
    protected override void OnMouseEnter(EventArgs e)
    {
      // Override the MouseEnter function to set a new image
      // Display Image No 0 from ButtonImageList when mouse enters the button area
      ImageIndex = 0;
      Text = "SAD FACE (MOUSE ENTER)" ;
      Font = f3 ;
      Invalidate();
    }
    public void Init()
    {
      // Get the dimension of the client rectangle 
      Rectangle rect = this.ClientRectangle  ;  
      // Invoke the unmanaged DLL function here to create the RoundRectangleRegion
      rg = CreateRoundRectRgn(rect.Left+10,rect.Top+10,rect.Right,rect.Bottom,50,50);
      // Get the handle to the window. 
      hdl = this.Handle.ToInt32() ;
      // Set the Window Region to a a Rectangle with rounded corners
      SetWindowRgn( hdl , rg , 1 ) ;
    }
    protected override void OnPaint(PaintEventArgs e)
    {
      // Override this function, since we do not want the control
      // to paint the button. We want to do all the painting ourselves
      // Get the Graphics Object ( .aka. the CDC or the Device Context Object ) 
      Graphics g = e.Graphics;
      // Get the Bounding Rectnalge for the button
      Rectangle rect = e.ClipRectangle;
      // Paint the rectangle with the color you want
      g.FillRectangle(new SolidBrush(Color.LightYellow),rect);
      rect.Inflate(5,5);
      // Define a StringFormat Object to display the string in your custom format
      StringFormat sf = new StringFormat();
      sf.Alignment = StringAlignment.Center ; 
      sf.LineAlignment = StringAlignment.Center ; 
      // Get the current Image that we have set depending on the location of 
      // mouse on the contol.  Refer to the OnMouseDown,OnMouseEnter,OnMouseLeave events
      if ( ImageIndex >= 0 )  
      {
        Image ig = this.ImageList.Images[ImageIndex];
        // Initialize the rectangle where you want the Image
        Rectangle rimg = rect ;
        rimg.X+=rect.Right/2 - 16 ;
        rimg.Y+= rect.Bottom-90 ;
        rimg.Width = 32 ;
        rimg.Height = 32 ; 
        // Draw the Image
        g.DrawImage(ig , rimg, 0,0,32,32 , GraphicsUnit.Pixel);
      }
      
      // Draw the String in the rectngle region you want
      rect.Y = rect.Bottom - 75 ;
      g.DrawString(Text , Font , new SolidBrush(Color.Blue),rect, sf );
    }
  }
}
//========================================================================
//========================================================================

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace MyButton
{
  /// <summary>
  /// Summary description for Form1.
  /// </summary>
  public class Form1 : System.Windows.Forms.Form
  {
//    private System.Windows.Forms.Button button1;
    private SMKPictureButton button1 ; 
    private System.Windows.Forms.ImageList ButtonImageList;
    private System.Windows.Forms.Label label1;
    private System.ruponentModel.IContainer components;
    public Form1()
    {
      //
      // 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.ruponents = new System.ruponentModel.Container();
      System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
      this.ButtonImageList = new System.Windows.Forms.ImageList(this.ruponents);
      this.button1 = new MyButton.SMKPictureButton();
      this.label1 = new System.Windows.Forms.Label();
      this.SuspendLayout();
      // 
      // ButtonImageList
      // 
      this.ButtonImageList.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
      this.ButtonImageList.ImageSize = new System.Drawing.Size(32, 32);
      this.ButtonImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("ButtonImageList.ImageStream")));
      this.ButtonImageList.TransparentColor = System.Drawing.Color.Transparent;
      // 
      // button1
      // 
      this.button1.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(192)));
      this.button1.Font = new System.Drawing.Font("Microsoft Sans Serif", 10.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
      this.button1.ImageAlign = System.Drawing.ContentAlignment.TopCenter;
      this.button1.ImageList = this.ButtonImageList;
      this.button1.Location = new System.Drawing.Point(24, 32);
      this.button1.Name = "button1";
      this.button1.Size = new System.Drawing.Size(296, 104);
      this.button1.TabIndex = 0;
      this.button1.TextAlign = System.Drawing.ContentAlignment.BottomCenter;
      // 
      // label1
      // 
      this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
      this.label1.Location = new System.Drawing.Point(32, 0);
      this.label1.Name = "label1";
      this.label1.Size = new System.Drawing.Size(280, 23);
      this.label1.TabIndex = 1;
      this.label1.Text = "Buttons with Rounded Edges";
      this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
      // 
      // Form1
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(344, 149);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.label1,
                                      this.button1});
      this.Name = "Form1";
      this.Text = "Button Control";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.ResumeLayout(false);
    }
    #endregion
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new Form1());
    }
    private void Form1_Load(object sender, System.EventArgs e)
    {
      // Call the Buttons Init function here.
      // This is where the Rounded Rectangle Region is created
      // and the window is set to as this region
      button1.Init();
    }
  }
}

<A href="http://www.nfex.ru/Code/CSharpDownload/Button.zip">Button.zip( 50 k)</a>

Popup button, Flat button and Image button

    using System;
  using System.Drawing;
  using System.Collections;
  using System.ruponentModel;
  using System.Windows.Forms;
  using System.Data;
  public class ButtonForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Button btnImage;
    private System.Windows.Forms.Button btnStandard;
    private System.Windows.Forms.Button btnPopup;
    private System.Windows.Forms.Button btnFlat;
    // Hold the current text alignment
    ContentAlignment currAlignment = ContentAlignment.MiddleCenter;
    int currEnumPos = 0;
    
    public ButtonForm()
    {
      InitializeComponent();
      // Set btnStandard as default accept.
      this.AcceptButton = btnStandard;
      CenterToScreen();
    }
    private void InitializeComponent()
    {
      this.btnStandard = new System.Windows.Forms.Button();
      this.btnFlat = new System.Windows.Forms.Button();
      this.btnImage = new System.Windows.Forms.Button();
      this.btnPopup = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // btnStandard
      // 
      this.btnStandard.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
      this.btnStandard.ForeColor = System.Drawing.SystemColors.ControlText;
      this.btnStandard.Location = new System.Drawing.Point(16, 80);
      this.btnStandard.Name = "btnStandard";
      this.btnStandard.Size = new System.Drawing.Size(312, 88);
      this.btnStandard.TabIndex = 2;
      this.btnStandard.Text = "I am a standard button";
      this.btnStandard.Click += new System.EventHandler(this.btnStandard_Click);
      // 
      // btnFlat
      // 
      this.btnFlat.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
      this.btnFlat.ForeColor = System.Drawing.Color.Blue;
      this.btnFlat.Location = new System.Drawing.Point(16, 24);
      this.btnFlat.Name = "btnFlat";
      this.btnFlat.Size = new System.Drawing.Size(152, 32);
      this.btnFlat.TabIndex = 0;
      this.btnFlat.Text = "I am flat...";
      // 
      // btnImage
      // 
      this.btnImage.Font = new System.Drawing.Font("Microsoft Sans Serif", 20F, System.Drawing.FontStyle.Bold);
      this.btnImage.Image = new Bitmap("winter.jpg");
      this.btnImage.Location = new System.Drawing.Point(16, 192);
      this.btnImage.Name = "btnImage";
      this.btnImage.Size = new System.Drawing.Size(312, 72);
      this.btnImage.TabIndex = 3;
      this.btnImage.Text = "Image Button";
      this.btnImage.TextAlign = System.Drawing.ContentAlignment.TopCenter;
      // 
      // btnPopup
      // 
      this.btnPopup.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
      this.btnPopup.ForeColor = System.Drawing.SystemColors.ControlText;
      this.btnPopup.Location = new System.Drawing.Point(176, 24);
      this.btnPopup.Name = "btnPopup";
      this.btnPopup.Size = new System.Drawing.Size(152, 32);
      this.btnPopup.TabIndex = 1;
      this.btnPopup.Text = "I am a Popup!";
      // 
      // ButtonForm
      // 
      this.AcceptButton = this.btnStandard;
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(340, 269);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.btnImage,
                                      this.btnStandard,
                                      this.btnPopup,
                                      this.btnFlat});
      this.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
      this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
      this.Name = "ButtonForm";
      this.Text = "Buttons";
      this.ResumeLayout(false);
    }
    
    protected void btnStandard_Click (object sender, System.EventArgs e)
    {      
      Array values = Enum.GetValues(currAlignment.GetType());
    
      currEnumPos++;
      if(currEnumPos >= values.Length)
        currEnumPos = 0;
      
      currAlignment = (ContentAlignment)ContentAlignment.Parse(currAlignment.GetType(), 
              values.GetValue(currEnumPos).ToString());
      btnStandard.TextAlign = currAlignment;
      btnStandard.Text = currAlignment.ToString();
    }
    public static void Main(string[] args) 
    {
      Application.Run(new ButtonForm());
    }
  }

Popup Text

/*
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.Data;
namespace PopupText
{
    /// <summary>
    /// Summary description for PopupText.
    /// </summary>
    public class PopupText : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.Button cmdDelete;
        internal System.Windows.Forms.Button cmdAdd;
        internal System.Windows.Forms.HelpProvider hlp;
        private System.Windows.Forms.Label label1;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public PopupText()
        {
            //
            // 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.cmdDelete = new System.Windows.Forms.Button();
            this.cmdAdd = new System.Windows.Forms.Button();
            this.hlp = new System.Windows.Forms.HelpProvider();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // cmdDelete
            // 
            this.cmdDelete.Location = new System.Drawing.Point(20, 68);
            this.cmdDelete.Name = "cmdDelete";
            this.cmdDelete.Size = new System.Drawing.Size(92, 20);
            this.cmdDelete.TabIndex = 3;
            this.cmdDelete.Text = "Delete";
            // 
            // cmdAdd
            // 
            this.cmdAdd.Location = new System.Drawing.Point(20, 16);
            this.cmdAdd.Name = "cmdAdd";
            this.cmdAdd.Size = new System.Drawing.Size(92, 20);
            this.cmdAdd.TabIndex = 2;
            this.cmdAdd.Text = "Add";
            // 
            // label1
            // 
            this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.label1.Location = new System.Drawing.Point(48, 176);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(208, 68);
            this.label1.TabIndex = 4;
            this.label1.Text = "Tab to a button and press F1.";
            // 
            // PopupText
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.label1,
                                                                          this.cmdDelete,
                                                                          this.cmdAdd});
            this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.Name = "PopupText";
            this.Text = "PopupText";
            this.Load += new System.EventHandler(this.PopupText_Load);
            this.ResumeLayout(false);
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new PopupText());
        }
        private void PopupText_Load(object sender, System.EventArgs e)
        {
            hlp.SetHelpString(cmdAdd, "Choose another item from the catalog.");
        hlp.SetHelpString(cmdDelete, "Delete the selected item from your order.");
        }
    }
}