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4/8/2010

Use the lineGetMuteStatefunction 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 lineOpenwith 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

See Also