화면 캡처

Bitmap bmp =new Bitmap(Screen.PrimaryScreen.Bounds.Width,
                       Screen.PrimaryScreen.Bounds.Height);
                       
using(Graphics g = Graphics.FromImage(bmp))
{
	g.CopyFromScreen(Screen.PrimaryScreen.Bounds.X,
                     Screen.PrimaryScreen.Bounds.Y,
                     0, 0,
                     bmp.Size,
                     CopyPixelOperation.SourceCopy);                    
}