lineGetMuteState
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4/8/2010
Use the lineGetMuteState function to retrieve the mute state of the device.
Syntax
LONG WINAPI lineGetMuteState(
HLINE hLine,
LPDWORD lpdwState
);
Parameters
- hLine
The line device handle. The line device handle must have been previously obtained by a call to lineOpen with the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion.
lpdwState
Points to a DWORD indicating the mute state. Possible values are listed in the following table.Value Description LINEMUTESTATE_MUTEENABLED
Mute is enabled.
LINEMUTESTATE_MUTEDISABLED
Mute is disabled.
Return Value
Returns zero if the function completes successfully, or a negative error number if an error occurs. The following are possible return values:
- LINEERR_RESOURCEUNAVAIL
- LINEERR_INVALLINEHANDLE
- LINEERR_STRUCTURETOOSMALL
- LINEERR_INVALPOINTER
- LINEERR_UNINITIALIZED
- LINEERR_NOMEM
- LINEERR_OPERATIONUNAVAIL
- LINEERR_OPERATIONFAILED
Remarks
This function is synchronous. No LINE_REPLY message is sent.
Requirements
| Header | extapi.h |
| Library | cellcore.lib |
| Windows Embedded CE | Windows Embedded CE 6.0 and later |
| Windows Mobile | Pocket PC 2002 and later, Smartphone 2002 and later |