IDirectDrawVideoPort::GetVideoSignalStatus

The IDirectDrawVideoPort::GetVideoSignalStatus method retrieves the status of the video signal currently being presented to the video port.

HRESULT GetVideoSignalStatus(
  LPDWORD lpdwStatus  
);
 

Parameters

lpdwStatus

Address of a variable that will contain a return code indicating the quality of the video signal at the video port. The value will be set to one of the following codes:

DDVPSQ_NOSIGNAL

No video signal is present at the video port.

DDVPSQ_SIGNALOK

A valid video signal is present at the video port.

Return Values

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:

QuickInfo

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dvp.h.
  Import Library: Use ddraw.lib.