创建异形窗口

HRGN CreateWindowRgnFromImage( DWORD width, DWORD height, void* pData, DWORD TransColor )
{
	HRGN hWndRgn = CreateRectRgn( 0, 0, width, height );
	DWORD* p = (DWORD*)pData;
	HRGN hTempRgn = NULL;

	for( int j = width - 1; j >= 0; --j )
	{
		for( int i = 0; i < height; ++i )
		{
			if( *p++ == TransColor )
			{
				hTempRgn = CreateRectRgn( i, j, i + 1, j + 1 );
				CombineRgn( hWndRgn, hWndRgn, hTempRgn, RGN_XOR );
				DeleteObject( hTempRgn );
			}
		}
	}
	return hWndRgn;
}