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lineSetMuteState (Compact 2013)

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3/26/2014

Use the lineSetMuteState function to set the mute state.

Syntax

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.

  • 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 Value

Returns a positive request identifier if the function is completed asynchronously, or 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

Header

extapi.h

Library

cellcore.lib

See Also

Reference

Extended TAPI Functions