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<H1><A NAME="_tapi2_phonecallbackfunc"></A>phoneCallbackFunc</H1>

<P>The <B>phoneCallbackFunc</B> function is a placeholder for the application-supplied function name. </P>

<PRE class=syntax><B>VOID FAR PASCAL phoneCallbackFunc(
  HANDLE</B><I> hDevice</I><B>,            </B>
<B>  DWORD</B><I> dwMsg</I><B>,               </B>
<B>  DWORD</B><I> dwCallbackInstance</I><B>,  </B>
<B>  DWORD</B><I> dwParam1</I><B>,            </B>
<B>  DWORD</B><I> dwParam2</I><B>,            </B>
<B>  DWORD</B><I> dwParam3             </I>
<B>);</B></PRE>

<H4>Parameters</H4>

<DL>
<DT><I>hDevice</I> </DT>

<DD>A handle to a phone device associated with the callback. </DD>

<DT><I>dwMsg</I> </DT>

<DD>A line or call device message. </DD>

<DT><I>dwCallbackInstance</I> </DT>

<DD>Callback instance data passed back to the application in the callback. This <B>DWORD</B> is not interpreted by TAPI. </DD>

<DT><I>dwParam1</I> </DT>

<DD>A parameter for the message. </DD>

<DT><I>dwParam2</I> </DT>

<DD>A parameter for the message. </DD>

<DT><I>dwParam3</I> </DT>

<DD>A parameter for the message. 
</DD>
</DL>

<H4>Remarks</H4>

<P>For more information about the parameters passed to this callback function, see <A HREF="msgs_3c4z.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_3c4z.htm">TAPI Messages</A>.</P>

<P>All callbacks occur in the application's context. The callback function must reside in a dynamic-link library (DLL) or application module and be exported in the module-definition file. </P>

<H4><A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm  \n\n这个文件不能通过 Teleport Pro 取回, 因为 地址在一个域或为它的开始地址设定的边界的外部路径上.  \n\n你想从服务器打开它吗?'))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>&nbsp;&nbsp;Windows NT/2000: </B>Requires Windows NT 4.0 SP3 or later.<BR>
<B>&nbsp;&nbsp;Windows 95/98: </B>Requires Windows 95 or later.<BR>
<B>&nbsp;&nbsp;Version: </B>Requires TAPI 1.3 or later.<BR>
<B>&nbsp;&nbsp;Header: </B>Declared in Tapi.h.</P>
<DIV CLASS="footer">Built on Monday, August 14, 2000</DIV>
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