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lineGetCallWaitingState (Compact 2013)

  • Article

3/26/2014

Use the lineGetCallWaitingState function to retrieve the list of media modes for which call waiting is enabled.

Syntax

LONG WINAPI lineGetCallWaitingState(
  HLINE hLine,
  LPDWORD lpdwClasses
);

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.
  • lpdwClasses
    Points to a DWORD indicating which line capability classes are enabled for call waiting. See the Line Capability Classes constants for possible values.

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. Not implemented for CDMA.

Requirements

Header

extapi.h

Library

cellcore.lib

See Also

Reference

Extended TAPI Functions
Line Capability Classes