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<H1><A NAME="_tapi2_phonegetid"></A>phoneGetID</H1>
<P>The <B>phoneGetID</B> function returns a device identifier for the given device class associated with the specified phone device. </P>
<PRE class=syntax><B>LONG WINAPI phoneGetID(
HPHONE</B><I> hPhone</I><B>, </B>
<B> LPVARSTRING</B><I> lpDeviceID</I><B>, </B>
<B> LPCSTR</B><I> lpszDeviceClass </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>hPhone</I> </DT>
<DD>A handle to an open phone device. </DD>
<DT><I>lpDeviceID</I> </DT>
<DD>A pointer to a data structure of type <A HREF="struc2_8vle.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_8vle.htm"><B>VARSTRING</B></A> where the device identifier is returned. Upon successful completion of the request, this location is filled with the device identifier. The format of the returned information depends on the method used by the device class (API) for naming devices. </DD>
<DT><I>lpszDeviceClass</I> </DT>
<DD>A pointer to a null-terminated string that specifies the device class of the device whose identifier is requested. Valid device class strings are those used in the system.ini section to identify device classes.
</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_INVALDEVICECLASS, PHONEERR_UNINITIALIZED, PHONEERR_OPERATIONFAILED, PHONEERR_STRUCTURETOOSMALL, PHONEERR_OPERATIONUNAVAIL. </P>
<H4>Remarks</H4>
<P>The <B>phoneGetID</B> function can be used to retrieve a phone device identifier given a phone handle. It can also be used to obtain the device identifier of the media device (for device classes such as COM, wave, MIDI, phone, line, or NDIS) associated with the opened phone device. The names of these device class are not case sensitive. This identifier can then be used with the appropriate media API to select the corresponding device. </P>
<P>See <A HREF="devclass_9nar.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/devclass_9nar.htm">TAPI Device Classes</A> for device class names. </P>
<P>A vendor that defines a device-specific media type also needs to define the corresponding device-specific (proprietary) API to manage devices of the media type. To avoid collisions on device class names assigned independently by different vendors, a vendor should select a name that uniquely identifies both the vendor and, following it, the media type. For example: "intel/video". </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_4rub.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_4rub.htm">Supplementary Phone Service Functions</A>, <A HREF="struc2_8vle.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc2_8vle.htm"><B>VARSTRING</B></A></P>
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