IDirectDrawSurface::GetBltStatus

HRESULT GetBltStatus(DWORD dwFlags);

Obtains the blitter status. This method returns DD_OK if a blitter is present, DDERR_WASSTILLDRAWING if the blitter is busy, or DDERR_NOBLTHW if there is no blitter.

·Returns DD_OK if successful, or one of the following error values otherwise:

dwFlags

DDGBS_CANBLT

Inquires whether a blit involving this surface can occur immediately. Returns DD_OK if the blit can be completed.

DDGBS_ISBLTDONE

Inquires whether the blit is done. Returns DD_OK if the last blit on this surface has completed.