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<H1><A NAME="_tapi2_linegeticon"></A>lineGetIcon</H1>
<P>The <B>lineGetIcon</B> function allows an application to retrieve a service line device-specific (or provider-specific) icon for display to the user. </P>
<PRE class=syntax><B>LONG WINAPI lineGetIcon(
DWORD</B><I> dwDeviceID</I><B>, </B>
<B> LPCSTR</B><I> lpszDeviceClass</I><B>, </B>
<B> LPHICON</B><I> lphIcon </I>
<B>);</B></PRE>
<H4>Parameters</H4>
<DL>
<DT><I>dwDeviceID</I> </DT>
<DD>The line device whose icon is requested. </DD>
<DT><I>lpszDeviceClass</I> </DT>
<DD>A pointer to a null-terminated string that identifies a device class name. This device class allows the application to select a specific sub-icon applicable to that device class. This parameter is optional and can be left NULL or empty, in which case the highest-level icon associated with the line device rather than a specified media stream device would be selected. </DD>
<DT><I>lphIcon</I> </DT>
<DD>A pointer to a memory location in which the handle to the icon is returned.
</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_OPERATIONFAILED, LINEERR_INVALPOINTER, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALDEVICECLASS, LINEERR_UNINITIALIZED, LINEERR_NOMEM, LINEERR_NODEVICE.</P>
<H4>Remarks</H4>
<P>The <B>lineGetIcon</B> function causes the provider to return a handle (in <I>lphIcon</I>) to an icon resource (obtained from <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/winui/icons_799r.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/winui/icons_799r.htm'" tppabs="http://msdn.microsoft.com/library/psdk/winui/icons_799r.htm"><B>LoadIcon</B></A>) that is associated with the specified line. The icon handle is for a resource associated with the provider. The application must use <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/winui/icons_799q.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/winui/icons_799q.htm'" tppabs="http://msdn.microsoft.com/library/psdk/winui/icons_799q.htm"><B>CopyIcon</B></A> if it wants to reference the icon after the provider is unloaded, which is unlikely to happen as long as the application has the line open. </P>
<P>The <I>lpszDeviceClass</I> parameter allows the provider to return different icons based on the type of service being referenced by the caller. The permitted strings are the same as for <A HREF="func1_2gf8.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2gf8.htm"><B>lineGetID</B></A>. For example, if the line supports the Comm API, passing "COMM" as <I>lpszDeviceClass</I> causes the provider to return an icon related specifically to the Comm device functions of the service provider. The parameters "tapi/line", "", or NULL can be used to request the icon for the line service. </P>
<P>For applications using an API version earlier than 2.0, if the provider does not return an icon (whether because the given device class is invalid or the provider does not support icons), TAPI substitutes a generic Win32 Telephony line device icon. For applications using API version 2.0 or later, TAPI substitutes the default line icon <I>only</I> if the <I>lpszDeviceClass</I> parameter is "tapi/line", "" or NULL. For any other device class, if the given device class is not valid or the provider does not support icons for the class, <B>lineGetIcon</B> returns LINEERR_INVALDEVICECLASS. </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> 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="func1_2gf8.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2gf8.htm"><B>lineGetID</B></A></P>
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