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:
| DDERR_INVALIDOBJECT |
| DDERR_INVALIDPARAMS |
| DDERR_UNSUPPORTED |
QuickInfo
Windows NT: Use version 5.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in dvp.h.
Import Library: Use ddraw.lib.