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This topic applies to Windows XP or later.
The ChannelAvailable method queries whether a specified channel is available for viewing.
This method is currently not supported.
Syntax
HRESULT ChannelAvailable(
[in] long nChannel,
[in, out] long *pSignalStrength,
[out] VARIANT_BOOL *pfSignalPresent
);
Parameters
nChannel [in]
Integer containing the channel.pSignalStrength [in, out]
Pointer to a long value that specifies the signal strength.pfSignalPresent [out]
Pointer to a VARIANT_BOOL flag that indicates whether a signal is present.
Return Value
If the method succeeds, it returns S_OK. If it fails, it returns an error code.
Requirements
Header | Declared in Dshow.h. |
DLL | Requires Quartz.dll. |
See Also
IAMTuner::SignalPresent
IMSVidAnalogTuner Interface
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Build date: 12/4/2008