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<H1><A NAME="_tapi2_phonegethookswitch"></A>phoneGetHookSwitch</H1>
<P>The <B>phoneGetHookSwitch</B> function returns the current hookswitch mode of the specified open phone device. </P>
<PRE class=syntax><B>LONG WINAPI phoneGetHookSwitch(
HPHONE</B><I> hPhone</I><B>, </B>
<B> LPDWORD</B><I> lpdwHookSwitchDevs </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>hPhone</I> </DT>
<DD>A handle to the open phone device. </DD>
<DT><I>lpdwHookSwitchDevs</I> </DT>
<DD>A pointer to a <B>DWORD</B> to be filled with the mode of the phone's hookswitch devices. If a bit position is FALSE, the corresponding hookswitch device is onhook; if TRUE, the microphone and/or speaker part of the corresponding hookswitch device is offhook. To find out whether the microphone and/or speaker are enabled, the application can use <A HREF="func2_7usz.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_7usz.htm"><B>phoneGetStatus</B></A>. This parameter uses one or more of the <A HREF="constnts_3tgz.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/constnts_3tgz.htm">PHONEHOOKSWITCHDEV_ Constants</A>.
</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>PHONEERR_INVALPHONEHANDLE, PHONEERR_NOMEM, PHONEERR_INVALPOINTER, PHONEERR_RESOURCEUNAVAIL, PHONEERR_INVALPHONESTATE, PHONEERR_OPERATIONFAILED, PHONEERR_OPERATIONUNAVAIL, PHONEERR_UNINITIALIZED.</P>
<H4>Remarks</H4>
<P>After the hookswitch state of a device changes, and if hookswitch monitoring is enabled, the application is sent a <A HREF="msgs_3f8l.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_3f8l.htm">PHONE_STATE</A> message. </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 1.3 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_4rub.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_4rub.htm">Supplementary Phone Service Functions</A>, <A HREF="msgs_3f8l.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/msgs_3f8l.htm">PHONE_STATE</A>, <A HREF="func2_7usz.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_7usz.htm"><B>phoneGetStatus</B></A></P>
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