IDirectDrawSurface::GetPixelFormat
HRESULT GetPixelFormat(LPDDPIXELFORMAT lpDDPixelFormat);
Returns the color and pixel format of the surface.
·Returns DD_OK if successful, or one of the following error values otherwise:
DDERR_INVALIDOBJECT DDERR_INVALIDPARAMS
lpDDPixelFormat
Address of the DDPIXELFORMAT structure that will be filled in with a detailed description of the current pixel and color space format of the surface.