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<H1><A NAME="_tapi2_linegetproviderlist"></A>lineGetProviderList</H1>
<P>The <B>lineGetProviderList</B> function returns a list of service providers currently installed in the telephony system. </P>
<PRE class=syntax><B>LONG WINAPI lineGetProviderList(
DWORD</B><I> dwAPIVersion</I><B>, </B>
<B> LPLINEPROVIDERLIST</B><I> lpProviderList </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>dwAPIVersion</I> </DT>
<DD>The highest version of TAPI supported by the application (<I>not</I> necessarily the value negotiated by <A HREF="func2_9kxa.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_9kxa.htm"><B>lineNegotiateAPIVersion</B></A> on some particular line device). </DD>
<DT><I>lpProviderList</I> </DT>
<DD>A pointer to a memory location where TAPI can return a <A HREF="struc2_4bci.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_4bci.htm"><B>LINEPROVIDERLIST</B></A> structure. Prior to calling <B>lineGetProviderList</B>, the application should set the <B>dwTotalSize</B> member of this structure to indicate the amount of memory available to TAPI for returning information.
</DD>
</DL>
<H4>Return Values</H4>
<P>Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are: </P>
<P>LINEERR_INCOMPATIBLEAPIVERSION, LINEERR_NOMEM, LINEERR_INIFILECORRUPT, LINEERR_OPERATIONFAILED, LINEERR_INVALPOINTER, LINEERR_STRUCTURETOOSMALL. </P>
<H4>Remarks</H4>
<P>Although this is a new function that older applications would not be expected to call, for backward compatibility they should not be prevented from doing so. The function works the same way for all applications. </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 NT 4.0 SP3 or later.<BR>
<B> Windows 95/98: </B>Requires Windows 95 or later.<BR>
<B> Version: </B>Requires TAPI 1.4 or later.<BR>
<B> Header: </B>Declared in Tapi.h.<BR>
<B> Library: </B>Use Tapi32.lib.<BR>
<B> Unicode: </B>Implemented as Unicode and ANSI versions on all platforms.</P>
<H4>See Also</H4>
<P><A HREF="quickref_1okl.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_1okl.htm">TAPI 2.2 Reference Overview</A>, <A HREF="quickref_6gvn.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_6gvn.htm">Supplementary Line Service Functions</A>, <A HREF="func2_9kxa.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_9kxa.htm"><B>lineNegotiateAPIVersion</B></A>, <A HREF="struc2_4bci.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_4bci.htm"><B>LINEPROVIDERLIST</B></A></P>
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