     #if 0      const HDC hScreenDC = GetDC(0);       HDC hInvDC = CreateCompatibleDC(hScreenDC);      HBITMAP hInvBmp = CreateCompatibleBitmap(hScreenDC, pI->nWidth, pI->nHeight);      HBITMAP hOldInvBmp = (HBITMAP)SelectObject(hInvDC, hInvBmp);       BitBlt(hInvDC, 0, 0, pI->nWidth, pI->nHeight, pI->hDc, 0,0, 