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lineGetCallWaitingCaps (Compact 2013)

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3/26/2014

Use the lineGetCallWaitingCaps function to retrieve the set of media modes for which call waiting is supported by the radio hardware. The actual set of usable modes may be smaller depending on network capabilities and the provisioning of a particular subscriber.

Syntax

LONG WINAPI lineGetCallWaitingCaps(
  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 bit field DWORD that enumerates all supported line capability classes. 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.

Requirements

Header

extapi.h

Library

cellcore.lib

See Also

Reference

Extended TAPI Functions
Line Capability Classes