code: def ToBitmap(self, x: int = 0, y: int = 0, width: int = 0, height: int = 0) -> Bitmap:
          
          bitmap = Bitmap()
          bitmap.FromControl(self, x, y, width, height)
          return bitmap
docs: Capture control to a Bitmap object.
          x, y: int, the point in control's internal position(from 0,0).
          width, height: int, image's width and height from x, y, use 0 for entire area.
                         If width(or height) < 0, image size will be control's width(or height) - width(or height).