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<H1><A NAME="_tapi2_lineremoveprovider"></A>lineRemoveProvider</H1>
<P>The <B>lineRemoveProvider</B> function removes an existing telephony service provider from the telephony system. </P>
<PRE class=syntax><B>LONG WINAPI lineRemoveProvider(
DWORD</B><I> dwPermanentProviderID</I><B>, </B>
<B> HWND</B><I> hwndOwner </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>dwPermanentProviderID</I> </DT>
<DD>The permanent provider identifier of the service provider to be removed. </DD>
<DT><I>hwndOwner</I> </DT>
<DD>A handle to a window to which any dialog boxes that need to be displayed as part of the removal process (for example, a confirmation dialog box by the service provider's <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/tspi21/func1_93l1.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/tspi21/func1_93l1.htm'" tppabs="http://msdn.microsoft.com/library/psdk/tspi21/func1_93l1.htm"><B>TSPI_providerRemove</B></A> function) would be attached. Can be a NULL value to indicate that any window created during the function should have no owner window.
</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_INIFILECORRUPT, LINEERR_NOMEM, LINEERR_INVALPARAM, LINEERR_OPERATIONFAILED.</P>
<H4>Remarks</H4>
<P>If the call to <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/tspi21/func1_93l1.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/tspi21/func1_93l1.htm'" tppabs="http://msdn.microsoft.com/library/psdk/tspi21/func1_93l1.htm"><B>TSPI_providerRemove</B></A> succeeds, and the telephony system is active at the time, TAPI calls <A HREF="func2_7sq6.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_7sq6.htm"><B>lineShutdown</B></A> and/or <A HREF="func2_7b8u.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_7b8u.htm"><B>phoneShutdown</B></A> on the service provider (depending on which device types are active). Any line or phone handles still held by applications on associated devices are forcibly closed with <A HREF="msgs_1hyd.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_1hyd.htm">LINE_CLOSE</A> or <A HREF="msgs_6751.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_6751.htm">PHONE_CLOSE</A> messages (it is preferable for service providers to issue these messages as part of <B>TSPI_providerRemove</B>, after verification with the user). The devices previously under the control of that provider are then marked as "unavailable", so that any future attempts by applications to reference them by device identifier result in LINEERR_NODRIVER. </P>
<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> 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 1.3 or later.<BR>
<B> Header: </B>Declared in Tapi.h.<BR>
<B> Library: </B>Use Tapi32.lib.</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="msgs_1hyd.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_1hyd.htm">LINE_CLOSE</A>, <A HREF="msgs_6751.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_6751.htm">PHONE_CLOSE</A></P>
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