lineSendUSSD
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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
| Header | extapi.h |
| Library | cellcore.lib |
| Windows Embedded CE | Windows CE 3.0 and later |
| Windows Mobile | Pocket PC 2002 and later, Smartphone 2002 and later |