Imports System
Imports System.Drawing
Imports System.Windows.Forms

    Public Class Form1
        Inherits System.Windows.Forms.Form

        Private button1 As System.Windows.Forms.Button = New Button
        Private button2 As System.Windows.Forms.Button = New Button

        <System.STAThreadAttribute()>  _
        Public Shared Sub Main()
            System.Windows.Forms.Application.Run(New Form1)
        End Sub

        Public Sub New()
            Me.button2.Location = New Point(0, button1.Height + 10)
            AddHandler Me.button2.Click, AddressOf Me.button2_Click
            Me.Controls.Add(Me.button1)
            Me.Controls.Add(Me.button2)
        End Sub

        Private Sub button2_Click(sender As Object, e As System.EventArgs)
            ' Draws a flat button on button1.
            ControlPaint.DrawButton(System.Drawing.Graphics.FromHwnd(button1.Handle), 0, 0, button1.Width, button1.Height, ButtonState.Flat)
        End Sub 'button2_Click
End Class

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

public class Form1 : Form
{
      private Button button1 = new Button();
      private Button button2 = new Button();


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


    public Form1(){
        this.button2.Location = new Point(0, button1.Height + 10);
        this.Click += new EventHandler(this.button2_Click);
        this.Controls.Add(this.button1);
        this.Controls.Add(this.button2);
    }

    private void button2_Click(object sender, System.EventArgs e)
    {
        // Draws a flat button on button1.
        ControlPaint.DrawButton(
        System.Drawing.Graphics.FromHwnd(button1.Handle),0,0,button1.Width,button1.Height,
                ButtonState.Flat);
    }
}

#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
   Button^ button1;
   Button^ button2;

public:
   Form1()
   {
      button1 = gcnew Button;
      button2 = gcnew Button;
      this->button2->Location = Point(0,button1->Height + 10);
      this->Click += gcnew EventHandler( this, &Form1::button2_Click );
      this->Controls->Add( this->button1 );
      this->Controls->Add( this->button2 );
   }


private:

   void button2_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {

      // Draws a flat button on button1.
      ControlPaint::DrawButton( System::Drawing::Graphics::FromHwnd( button1->Handle ), 0, 0, button1->Width, button1->Height, ButtonState::Flat );
   }

};


[STAThread]
void main()
{
   Application::Run( gcnew Form1 );
}