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<H1><A NAME="_tapi2_line_devspecificex"></A>LINE_DEVSPECIFICEX</H1>
<P>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. </P>
<PRE class=syntax>LINE_DEVSPECIFICEX
hDevice = (DWORD) hLineOrCall;
dwCallbackInstance = (DWORD) hCallback;
dwParam1 = (DWORD) DeviceSpecific1;
dwParam2 = (DWORD) DeviceSpecific2;
dwParam3 = (DWORD) DeviceSpecific3;</PRE>
<H4>Parameters</H4>
<DL>
<DT><I>hDevice</I> </DT>
<DD>A handle to either a line device or call. This parameter is device specific. </DD>
<DT><I>dwCallbackInstance</I> </DT>
<DD>The callback instance supplied when opening the line. </DD>
<DT><I>dwParam1</I> </DT>
<DD>Device specific. </DD>
<DT><I>dwParam2</I> </DT>
<DD>Device specific. </DD>
<DT><I>dwParam3</I> </DT>
<DD>Device specific.
</DD>
</DL>
<H4>Return Values</H4>
<P>No return value. </P>
<H4>Remarks</H4>
<P>The LINE_DEVSPECIFICEX message is used by a service provider in conjunction with the <A HREF="func1_9qcj.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_9qcj.htm"><B>lineDevSpecific</B></A> function. Its meaning is device specific. </P>
<H4><A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm \n\n這個文件不能通過 Teleport Pro 取回, 因為 地址在一個域或為它的開始地址設定的邊界的外部路徑上. \n\n你想從服務器打開它嗎?'))window.location='http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm'" tppabs="http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm">Requirements</A> </H4>
<P><B> Windows NT/2000: </B>Requires Windows 2000.<BR>
<B> Windows 95/98: </B>Unsupported.<BR>
<B> Version: </B>Requires TAPI 3.0 or later.<BR>
<B> Header: </B>Declared in Tapi.h.</P>
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