private static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst,\r
[In] ref Point pptDst, [In] ref Size psize,\r
IntPtr hdcSrc, [In] ref Point pptSrc,\r
private static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst,\r
[In] ref Point pptDst, [In] ref Size psize,\r
IntPtr hdcSrc, [In] ref Point pptSrc,\r