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<H1><A NAME="_tapi2_phonehookswitchmode__constants"></A>PHONEHOOKSWITCHMODE_ Constants</H1>
<P>The PHONEHOOKSWITCHMODE_ bit-flag constants describe the microphone and speaker components of a hookswitch device.
<DL>
<DT>PHONEHOOKSWITCHMODE_MIC </DT>
<DD>The device's microphone is active, the speaker is mute. </DD>
<DT>PHONEHOOKSWITCHMODE_MICSPEAKER </DT>
<DD>The device's microphone and speaker are both active. </DD>
<DT>PHONEHOOKSWITCHMODE_ONHOOK </DT>
<DD>The device's microphone and speaker are both onhook. </DD>
<DT>PHONEHOOKSWITCHMODE_SPEAKER </DT>
<DT>PHONEHOOKSWITCHMODE_UNKNOWN </DT>
<DD>The device's hookswitch mode is currently unknown.
</DD>
</DL>
<P>No extensibility. All 32 bits are reserved. </P>
<P>These constants are used to provide an individual level of control over the microphone and speaker components of a phone device. </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 2.0 or later.<BR>
<B> Header: </B>Declared in Tapi.h.</P>
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