[Win32 API] 더블 버퍼링 절차

HDC hdc = BeginPaint( hWnd, &ps )
HDC MemDC = CreateCompatibleDC( hdc )
HDC BGMemDC = CrateCompatibleDC( hdc )

HBITMAP bgBuffer = CreateCompatibleBitmap( hdc, x, y )
HBITMAP Old = (HBITMAP) SelectObject( BGMemDC, bgBuffer )

HBITMAP Old2 = (HBITMAP) SelectObject( MemDC, bmp )
BitBlt( MemDC to BGMemDC )
SelectObject( MemDC, Old2 )

BitBlt( BGMemDC to hdc )
SelectObject( BGMemDC, Old )

DeleteObject( MemDC )

EndPaint( hWnd, &ps )