lineCallbackFunc

This function is a placeholder for the application-supplied function name.

At a Glance

Syntax

VOID FAR PASCAL lineCallbackFunc( DWORD hDevice,
DWORD dwMsg, DWORD dwCallbackInstance, DWORD dwParam1,
DWORD dwParam2, DWORD dwParam3 );

Parameters

hDevice

Handle to either a line device or a call associated with the callback. The nature of this handle, line handle or call handle, can be determined by the context provided by dwMsg. Applications must use the DWORD type for this parameter because using the HANDLE type may cause an error.

dwMsg

Specifies a line or call device message.

dwCallbackInstance

Specifies the callback instance data passed back to the application in the callback. This DWORD is not interpreted by TAPI.

dwParam1

Contains message-specific data.

dwParam2

Contains message-specific data.

dwParam3

Contains message-specific data.

Remarks

All callbacks occur in the application context. The callback function must reside in a DLL or application module.