private static extern void _DwmSetWindowAttribute(IntPtr hwnd, DWMWA dwAttribute, ref int pvAttribute, int cbAttribute);
private static extern int DwmSetWindowAttribute( IntPtr hwnd, DWMWA dwAttribute, [In] ref uint pvAttribute, // IntPtr uint cbAttribute);
public static extern int DwmSetWindowAttribute(IntPtr hwnd, DWMWA dwAttribute, ref int pvAttribute, int cbAttribute);
public static extern uint DwmSetWindowAttribute( [In] IntPtr hwnd, [In] DWMWA dwAttribute, [In] ref uint pvAttribute, [In] uint cbAttribute);