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<H1><A NAME="_tapi2_tapierror_formatmessage"></A>TAPIERROR_FORMATMESSAGE</H1>

<P>The <B>TAPIERROR_FORMATMESSAGE</B> macro generates an identifier for standard TAPI error message text strings that can be obtained by Win32 applications using the Win32 <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/winbase/errors_0sdh.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/winbase/errors_0sdh.htm'" tppabs="http://msdn.microsoft.com/library/psdk/winbase/errors_0sdh.htm"><B>FormatMessage</B></A> function.</P>

<P>This mechanism should be used only for displaying information on errors for which the application has no defined method of recovery (that is, unexpected or internal errors). In most cases (unlike the following simplified example), it is desirable to include additional text informing the user of actions the application takes (or the user should take) as a result of the unhandled error.</P>

<P>If the application gets an error result from any TAPI function, the error value can be passed through the <B>TAPIERROR_FORMATMESSAGE</B> macro, which in turn generates the real value to be passed to <B>FormatMessage</B>. <B>FormatMessage</B> produces an error string corresponding to the error in a buffer. For example:</P>

<PRE>lResult = lineClose(hLine);

if (lResult &lt; 0)
{
        FormatMessage(FORMAT_MESSAGE_FROM_HMODULE,
                    (LPCVOID)GetModuleHandle("TAPIUI.DLL"),
                    TAPIERROR_FORMATMESSAGE(lResult),
                    0,
                    (LPTSTR)pBuf,
                    BUFSIZE,
                    NULL);
        MessageBox(hWnd,pBuf,"TAPI ERROR",MB_OK);
}</PRE>

<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>&nbsp;&nbsp;Windows NT/2000: </B>Requires Windows NT 4.0 SP3 or later.<BR>
<B>&nbsp;&nbsp;Windows 95/98: </B>Requires Windows 95 or later.<BR>
<B>&nbsp;&nbsp;Version: </B>Requires TAPI 2.0 or later.<BR>
<B>&nbsp;&nbsp;Header: </B>Declared in Tapi.h.</P>
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