The IDirectDrawVideoPort::StartVideo method enables the hardware video port and starts the flow of video data into the currently specified surface.
HRESULT StartVideo(
LPDDVIDEOPORTINFO lpVideoInfo
);
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 |
DDERR_SURFACELOST |
IDirectDrawVideoPort::SetTargetSurface, IDirectDrawVideoPort::StopVideo, IDirectDrawVideoPort::UpdateVideo