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<HTML><HEAD><TITLE>Xlib Programming Manual: Extensions: XESetErrorString</TITLE></HEAD><BODY><H1 ALIGN=center>XESetErrorString</H1><H2>Syntax</H2><!.IN "XESetErrorString" "" "@DEF@"><CODE><PRE>char *(*XESetErrorString(<B>display</B>, <B>extension</B>, <B>proc</B>))() <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; int <B>extension</B>; char *(*<B>proc</B>)();</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>extension</B><TD> Specifies the extension number.<TR><TD> <B>proc</B><TD> Specifies the procedure to call to obtain an error string.</TABLE><H2>Description</H2>The <B><A HREF="../../event-handling/protocol-errors/XGetErrorText.html">XGetErrorText()</A></B>function returns a string to the user for an error.<B>XESetErrorString()</B>allows you to define a procedure to be called thatshould return a pointer to the error message.The following is an example.<P><PRE><CODE>(*<B>proc</B>)(<B>display</B>, <B>code</B>, <B>codes</B>, <B>buffer</B>, <B>nbytes</B>) <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; int <B>code</B>; <A HREF="hooking-into-xlib.html#XExtCodes">XExtCodes</A> *<B>codes</B>; char *<B>buffer</B>; int <B>nbytes</B>;</PRE></CODE><P>Your procedure is called with the error code for every error detected.You should copy nbytes of a null-terminated string containing theerror message into buffer.<H2>See also</H2><B><A HREF="XESetBeforeFlush.html">XESetBeforeFlush()</A></B>,<B><A HREF="XESetCloseDisplay.html">XESetCloseDisplay()</A></B>,<B><A HREF="XESetCopyGC.html">XESetCopyGC()</A></B>,<B><A HREF="XESetCreateFont.html">XESetCreateFont()</A></B>,<B><A HREF="XESetCreateGC.html">XESetCreateGC()</A></B>,<B><A HREF="XESetError.html">XESetError()</A></B>,<B><A HREF="XESetEventToWire.html">XESetEventToWire()</A></B>,<B><A HREF="XESetFlushGC.html">XESetFlushGC()</A></B>,<B><A HREF="XESetFreeFont.html">XESetFreeFont()</A></B>,<B><A HREF="XESetFreeGC.html">XESetFreeGC()</A></B>,<B><A HREF="XESetPrintErrorValues.html">XESetPrintErrorValues()</A></B>,<B><A HREF="XESetWireToError.html">XESetWireToError()</A></B>,<B><A HREF="XESetWireToEvent.html">XESetWireToEvent()</A></B>,<B><A HREF="_XSetLastRequestRead.html">_XSetLastRequestRead()</A></B>,"<A HREF="hooks-into-the-library.html">Hooks into the Library</A>"<HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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