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<H1><A NAME="_tapi2_linegetlinedevstatus"></A>lineGetLineDevStatus</H1>

<P>The <B>lineGetLineDevStatus</B> function enables an application to query the specified open line device for its current status. </P>

<PRE class=syntax><B>LONG WINAPI lineGetLineDevStatus(
  HLINE</B><I> hLine</I><B>,                     </B>
<B>  LPLINEDEVSTATUS</B><I> lpLineDevStatus  </I>
<B>);</B></PRE>

<H4>Parameters</H4>

<DL>
<DT><I>hLine</I> </DT>

<DD>A handle to the open line device to be queried. </DD>

<DT><I>lpLineDevStatus</I> </DT>

<DD>A pointer to a variably sized data structure of type <A HREF="struc2_40oi.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_40oi.htm"><B>LINEDEVSTATUS</B></A>. Upon successful completion of the request, this structure is filled with the line's device status. Prior to calling <B>lineGetLineDevStatus</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_INVALLINEHANDLE, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALPOINTER, LINEERR_STRUCTURETOOSMALL, LINEERR_NOMEM, LINEERR_UNINITIALIZED, LINEERR_OPERATIONFAILED, LINEERR_OPERATIONUNAVAIL.</P>

<H4>Remarks</H4>

<P>An application uses <B>lineGetLineDevStatus</B> to query the line device for its current line status. This status information applies globally to all addresses on the line device. Use <A HREF="func1_5b5f.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_5b5f.htm"><B>lineGetAddressStatus</B></A> to determine status information about a specific address on a line. </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.<BR>
<B>&nbsp;&nbsp;Library: </B>Use Tapi32.lib.<BR>
<B>&nbsp;&nbsp;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_1pnp.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_1pnp.htm">Basic Telephony Services Reference</A>, <A HREF="struc2_40oi.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_40oi.htm"><B>LINEDEVSTATUS</B></A>,<B> <A HREF="func1_5b5f.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_5b5f.htm">lineGetAddressStatus</A></B> </P>
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