Platform SDK: TAPI

LINE_DEVSPECIFICEX

The TAPI LINE_DEVSPECIFICEX message is sent to notify the application about device-specific events occurring on a line, address, or call. The meaning of the message and the interpretation of the parameters are device specific.

LINE_DEVSPECIFICEX
hDevice = (DWORD) hLineOrCall;
dwCallbackInstance = (DWORD) hCallback;
dwParam1 = (DWORD) DeviceSpecific1;
dwParam2 = (DWORD) DeviceSpecific2;
dwParam3 = (DWORD) DeviceSpecific3;

Parameters

hDevice
A handle to either a line device or call. This parameter is device specific.
dwCallbackInstance
The callback instance supplied when opening the line.
dwParam1
Device specific.
dwParam2
Device specific.
dwParam3
Device specific.

Return Values

No return value.

Remarks

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

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Unsupported.
  Version: Requires TAPI 3.0 or later.
  Header: Declared in Tapi.h.