Platform SDK: TAPI

LINE_DEVSPECIFICFEATURE

The TAPI LINE_DEVSPECIFICFEATURE 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_DEVSPECIFICFEATURE
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 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_DEVSPECIFICFEATURE message is used by a service provider in conjunction with the lineDevSpecificFeature function. Its meaning is device specific.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later.
  Version: Requires TAPI 2.0 or later.
  Header: Declared in Tapi.h.