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LINE_DEVSPECIFICEX message

  • Article

The TSPI LINE_DEVSPECIFICEX message is sent to the LINEEVENT callback function to notify TAPI about extended device-specific events occurring on a line or address. The meaning of the message and the interpretation of the dwParam1, dwParam2, and dwParam3 parameters is device specific.


LINE_DEVSPECIFICEX
htLine = (HTAPILINE) hLineDevice;
htCall = (HTAPICALL) 0;
dwMsg = (DWORD) LINE_DEVSPECIFICEX;
dwParam1 = (DWORD) DeviceData1;
dwParam2 = (DWORD) DeviceData2;
dwParam3 = (DWORD) DeviceData3;

Parameters

  • htLine
    The TAPI opaque object handle to the line device.

  • htCall
    Unused.

  • dwMsg
    The value LINE_DEVSPECIFICEX.

  • dwParam1
    Device specific.

  • dwParam2
    Device specific.

  • dwParam3
    Device specific.

Remarks

The LINE_DEVSPECIFICEX message is used by a service provider in conjunction with the TSPI_lineDevSpecific function. Its meaning is device specific.

TAPI sends the LINE_DEVSPECIFICEX message to applications in response to receiving this message from a service provider. The htLine parameter is translated to the appropriate hLine as the hDevice parameter at the TAPI level. The dwParam1, dwParam2, and dwParam3 parameters are passed through unmodified.

Requirements

TAPI version

 Requires TAPI 2.2

Header

 Tapi.h

See also

LINE_CALLDEVSPECIFIC

LINEEVENT

TSPI_lineDevSpecific