lineGetMuteState (Compact 2013)
3/26/2014
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 |