lineSetMuteState

  • Article

Use the lineSetMuteState function to set the mute state.

LONG WINAPI lineSetMuteState(
  HLINE hLine,
  DWORD dwState
);

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. For more information about lineNegotiateExtVersion and lineOpen, see the TAPI Functions API Reference topics in the Windows CE SDK.
  • dwState
    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 Values

The lineSetMuteState function returns a positive request identifier if the function is completed asynchronously and returns a negative error number if an error occurs. The dwParam2 parameter of the corresponding LINE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following are possible return values:

LINEERR_INVALLINEHANDLE
LINEERR_NOMEM
LINEERR_OPERATIONUNAVAIL
LINEERR_OPERATIONFAILED
LINEERR_RESOURCEUNAVAIL
LINEERR_INVALPOINTER
LINEERR_INVALPARAM
LINEERR_UNINITIALIZED

Requirements

Pocket PC Platforms: Pocket PC 2002 and later
OS Versions: Windows CE 3.0 and later
Header: extapi.h
Library: cellcore.lib

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