lineSendUSSD

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

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

Syntax

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.

• 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 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

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

See Also

Reference

Extended TAPI Functions