private void SetClip()
{
int index = rtbText.GetFirstCharIndexOfCurrentLine();
Point point = rtbText.GetPositionFromCharIndex(index);
Windows7Taskbar.SetThumbnailClip(Handle, new Rectangle(point, new Size(200, 119)));
}
/// <summary>
/// Specifies that only a portion of the form's client area
/// should be used in the form's thumbnail.
/// </summary>
/// <param name="form">The form.</param>
/// <param name="clipRect">The rectangle that specifies the clipped region.</param>
public static void SetThumbnailClip(
this Form form, Rectangle clipRect)
{
Windows7Taskbar.SetThumbnailClip(form.Handle, clipRect);
}
/// <summary>
/// Specifies that only a portion of the form's client area
/// should be used in the form's thumbnail.
/// </summary>
/// <param name="form">The form.</param>
/// <param name="clipRect">The rectangle that specifies the clipped region.</param>
public static void SetThumbnailClip(
this Window form, Rectangle clipRect)
{
Windows7Taskbar.SetThumbnailClip(GetWindowHandle(form), clipRect);
}
