The IDirectDrawSurface3::BltBatch method performs a sequence of IDirectDrawSurface3::Blt operations from several sources to a single destination. This method is currently only a stub; it has not yet been implemented.
HRESULT BltBatch(
LPDDBLTBATCH lpDDBltBatch,
DWORD dwCount,
DWORD dwFlags
);
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: