| DirectX SDK | 
The IDirectDrawSurface7::GetPixelFormat method retrieves the color and pixel format of the surface.
HRESULT GetPixelFormat( LPDDPIXELFORMAT lpDDPixelFormat );
If the method succeeds, the return value is DD_OK.
If it fails, the method can return one of the following error values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
| DDERR_INVALIDSURFACETYPE | 
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 98.
  Header: Declared in ddraw.h.