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lineGetUSSD (Windows Embedded CE 6.0)

  • Article

1/6/2010

Use the lineGetUSSD function to read an Unstructured Supplementary Service Data (USSD) message.

Syntax

LONG WINAPI lineGetUSSD(
  HLINE hLine,
  DWORD dwID,
  LPBYTE lpbUSSD,
  DWORD dwUSSDSize,
  LPDWORD lpdwFlags
);

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.
  • dwID
    Indicates which USSD message to retrieve. The identifier is specified in the LINE_DEVSPECIFIC or LINE_USSD message that the application received.
  • lpbUSSD
    Points to a buffer to which the USSD message will be copied.
  • dwUSSDSize
    Indicates the size in bytes of the lpszUSSD buffer.

  • lpdwFlags
    Points to a DWORD indicating special flags pertaining to this network-originated USSD message. Possible values are listed in the following table.

    Value Description

    LINEUSSDFLAG_ACTIONREQUIRED

    Network needs more USSD information sent back.

    LINEUSSDFLAG_ACTIONNOTNEEDED

    Network does not need more USSD info.

    LINEUSSDFLAG_TERMINATED

    Network has terminated USSD session.

    LINEUSSDFLAG_OTHERCLIENTRESPONDED

    Network has terminated the USSD session because another client responded.

    LINEUSSDFLAG_UNSUPPORTED

    Network does not support USSD.

    LINEUSSDFLAG_TIMEOUT

    USSD session timed out.

    LINEUSSDFLAG_ENDSESSION

    Network is terminating USSD session.

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 is a privileged function.

This function is synchronous. No LINE_REPLY message is sent. Not implemented for CDMA.

Requirements

Header extapi.h
Library cellcore.lib
Windows Embedded CE Windows Embedded CE 6.0 and later

See Also

Reference

Extended TAPI Functions