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<H1><A NAME="_tapi2_linereleaseuseruserinfo"></A>lineReleaseUserUserInfo</H1>
<P>The <B>lineReleaseUserUserInfo</B> function informs the service provider that the application has processed the user-user information contained in the <A HREF="struc1_4oky.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_4oky.htm"><B>LINECALLINFO</B></A> structure, and that subsequently received user-user information can now be written into that structure. The service provider sends a <A HREF="msgs_1x0v.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_1x0v.htm">LINE_CALLINFO</A> message indicating LINECALLINFOSTATE_USERUSERINFO when new information is available. </P>
<PRE class=syntax><B>LONG WINAPI lineReleaseUserUserInfo(
HCALL</B><I> hCall </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>hCall</I> </DT>
<DD>A handle to the call. The application must be an owner of the call. The call state of <I>hCall</I> can be any state.
</DD>
</DL>
<H4>Return Values</H4>
<P>Returns a positive request identifier if the function is completed asynchronously or a negative error number if an error occurs. The <I>dwParam2</I> parameter of the corresponding <A HREF="msgs_65mh.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_65mh.htm">LINE_REPLY</A> message is zero if the function succeeds or it is a negative error number if an error occurs. Possible return values are: </P>
<P>LINEERR_INVALCALLHANDLE, LINEERR_OPERATIONFAILED, LINEERR_NOMEM, LINEERR_RESOURCEUNAVAIL, LINEERR_NOTOWNER, LINEERR_UNINITIALIZED, LINEERR_OPERATIONUNAVAIL. </P>
<H4>Remarks</H4>
<P>The <B>lineReleaseUserUserInfo</B> function allows the application to control the flow of incoming user-user information on an ISDN connection. When a new, complete user-user information message is received, the service provider informs the application using a <A HREF="msgs_1x0v.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_1x0v.htm">LINE_CALLINFO</A> message (specifying LINECALLINFOSTATE_USERUSERINFO). Any number of applications can examine the information (using <A HREF="func1_96cv.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_96cv.htm"><B>lineGetCallInfo</B></A>), but the application owning the call controls when the information is released so that subsequent information can be reported. The service provider will not overwrite previous user-user information in <A HREF="struc1_4oky.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_4oky.htm"><B>LINECALLINFO</B></A> with newer information until after <B>lineReleaseUserUserInfo</B> has been called. It is the responsibility of the service provider to buffer subsequently received user-user information until the previous information is released by the application owning the call. </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 1.4 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_1x0v.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_1x0v.htm">LINE_CALLINFO</A>, <A HREF="msgs_65mh.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_65mh.htm">LINE_REPLY</A>, <A HREF="struc1_4oky.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_4oky.htm"><B>LINECALLINFO</B></A>, <A HREF="func1_96cv.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_96cv.htm"><B>lineGetCallInfo</B></A></P>
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