lineSendUSSD

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Use the lineSendUSSD function to send an Unstructured Supplementary Service Data (USSD) message.

LONG WINAPI lineSendUSSD(
  HLINE hLine,
  const BYTE * const lpbUSSD,
  DWORD dwUSSDSize,
  DWORD dwFlags
);

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 on MSDN.
• lpbUSSD
  Points to a USSD command to send.
• dwUSSDSize
  The size in bytes of the USSD command.
• dwFlags
  Indicates special flags pertaining to the USSD command. Possible values are listed in the following table.

  Value	Description
  LINEUSSDFLAG_ENDSESSION	Mobile is ending the USSD session.

Return Values

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

Remarks

This is a privileged function.

The lineSendUSSD function sends only UNICODE formatted messages and does not support binary messages. Not implemented for CDMA.

Requirements

Pocket PC: Pocket PC 2002 and later.
Smartphone: Smartphone 2002 and later.
OS Versions: Windows CE 3.0 and later.
Header: Extapi.h.
Library: Cellcore.lib.

See Also

Extended TAPI Functions

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