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<H1><A NAME="_tapi2_linegetaddresscaps"></A>lineGetAddressCaps</H1>
<P>The <B>lineGetAddressCaps</B> function queries the specified address on the specified line device to determine its telephony capabilities. </P>
<PRE class=syntax><B>LONG WINAPI lineGetAddressCaps(
HLINEAPP</B><I> hLineApp</I><B>, </B>
<B> DWORD</B><I> dwDeviceID</I><B>, </B>
<B> DWORD</B><I> dwAddressID</I><B>, </B>
<B> DWORD</B><I> dwAPIVersion</I><B>, </B>
<B> DWORD</B><I> dwExtVersion</I><B>, </B>
<B> LPLINEADDRESSCAPS</B><I> lpAddressCaps </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>hLineApp</I></DT>
<DD>The handle to the application's registration with TAPI. </DD>
<DT><I>dwDeviceID</I></DT>
<DD>The line device containing the address to be queried. </DD>
<DT><I>dwAddressID</I></DT>
<DD>The address on the given line device whose capabilities are to be queried. An address identifier is permanently associated with an address; the identifier remains constant across operating system upgrades.</DD>
<DT><I>dwAPIVersion</I></DT>
<DD>The version number of the Telephony API to be used. The high-order word contains the major version number; the low-order word contains the minor version number. This number is obtained by <A HREF="func2_9kxa.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_9kxa.htm"><B>lineNegotiateAPIVersion</B></A>. </DD>
<DT><I>dwExtVersion</I></DT>
<DD>The version number of the service provider-specific extensions to be used. This number can be set to zero if no device-specific extensions are to be used. Otherwise, the high-order word contains the major version number; and the low-order word contains the minor version number. </DD>
<DT><I>lpAddressCaps</I></DT>
<DD>A pointer to a variably sized structure of type <A HREF="struc1_5uuq.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_5uuq.htm"><B>LINEADDRESSCAPS</B></A>. Upon successful completion of the request, this structure is filled with address capabilities information. Prior to calling <B>lineGetAddressCaps</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_BADDEVICEID, LINEERR_NOMEM, LINEERR_INCOMPATIBLEAPIVERSION, LINEERR_OPERATIONFAILED, LINEERR_INCOMPATIBLEEXTVERSION, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALADDRESSID, LINEERR_STRUCTURETOOSMALL, LINEERR_INVALAPPHANDLE, LINEERR_UNINITIALIZED, LINEERR_INVALPOINTER, LINEERR_OPERATIONUNAVAIL, LINEERR_NODRIVER, LINEERR_NODEVICE.</P>
<H4>Remarks</H4>
<P>Valid address identifiers range from zero to one less than the number of addresses returned by <A HREF="func1_2lbn.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2lbn.htm"><B>lineGetDevCaps</B></A>. The version number to be supplied is the version number that was returned as part of the line's device capabilities by <B>lineGetDevCaps</B>. </P>
<H4><A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm \n\n這個(gè)文件不能通過 Teleport Pro 取回, 因?yàn)?地址在一個(gè)域或?yàn)樗拈_始地址設(shè)定的邊界的外部路徑上. \n\n你想從服務(wù)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 1.3 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_1pnp.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_1pnp.htm">Basic Telephony Services Reference</A>, <A HREF="struc1_5uuq.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_5uuq.htm"><B>LINEADDRESSCAPS</B></A>,<B> <A HREF="func1_2lbn.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2lbn.htm">lineGetDevCaps</A></B>, <A HREF="func2_9kxa.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_9kxa.htm"><B>lineNegotiateAPIVersion</B></A></P>
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