C#

MyOCXClass ocx = new MyOCXClass();

[Guid("...")]
public interface IUSB
{
  void WriteSPI(
    [MarshalAs(UnmanagedType.LPArray,SizeParamIndex=1)]byte[] array,
    int size);
  // ...
}

public class MyApp : Form
{
  private MyApp()
  {
  }
  [STAThread]
  public static void Main()
  {
    Thread.CurrentThread.ApartmentState = ApartmentState.STA;
    Application.Run(new MyApp());
  }
}

Image imgA = imageListA.Images[indexA];
Image imgB = imageListB.Images[indexB];

<br />
        // i don't know why but in c# u have to declare all messages by ur self.<br />
        // all values of messages u need u can find in WinUser.h file.<br />
        private const int WM_CHAR = 0x0102<br />
        <br />
        protected override void WndProc(ref Message m) <br />
        {<br />
            // Listen for operating system messages.<br />
            switch (m.Msg)<br />
            {<br />
                  //catch the character code of the key that was pressed<br />
                  case WM_CHAR:<br />
                  // ur code<br />
                  // ...<br />
                break;          <br />
            }<br />
            base.WndProc(ref m);<br />
        }<br />

public class MyButton : Button
{
  public MyButton()
  {
    this.SetStyle(ControlStyles.Selectable, false);
  }
  // ...
}

public class MyButton : Button
{
  private const int BS_NOTIFY = 0x4000;
  public MyButton()
  {
  }
  protected override CreateParams CreateParams
  {
    get
    {
        System.Windows.Forms.CreateParams cp = base.CreateParams;
        cb.Style &= ~BS_NOTIFY;
        return cb;
    }
  }
  // ...
}