Function UpdateLayeredWindow

pub unsafe fn UpdateLayeredWindow(
    hwnd: HWND,
    hdcdst: Option<HDC>,
    pptdst: Option<*const POINT>,
    psize: Option<*const SIZE>,
    hdcsrc: Option<HDC>,
    pptsrc: Option<*const POINT>,
    crkey: COLORREF,
    pblend: Option<*const BLENDFUNCTION>,
    dwflags: UPDATE_LAYERED_WINDOW_FLAGS,
) -> Result<()>