The IDirectDraw2::GetFourCCCodes method retrieves the FOURCC codes supported by the DirectDraw object. This method can also retrieve the number of codes supported.
HRESULT GetFourCCCodes(
  LPDWORD lpNumCodes,  
  LPDWORD lpCodes      
);
 If the method succeeds, the return value is DD_OK.
If the method fails, the return value may be one of the following error values:
| DDERR_INVALIDOBJECT | 
| DDERR_INVALIDPARAMS | 
  Windows NT: Use version 4.0 or later.
  Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
  Windows CE: Unsupported.
  Header: Declared in ddraw.h.
  Import Library: Use ddraw.lib.