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<HTML><HEAD><TITLE>Xlib Programming Manual: XSetErrorHandler</TITLE></HEAD><BODY><H1 ALIGN=center>XSetErrorHandler</H1><H2>Syntax</H2><!.IN "XSetErrorHandler" "" "@DEF@"><CODE><PRE>int (*XSetErrorHandler(<B>handler</B>))() int (*<B>handler</B>)(<A HREF="../../display/opening.html#Display">Display</A> *, <A HREF="default-handlers.html#XErrorEvent">XErrorEvent</A> *)</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>handler</B><TD> Specifies the program's supplied error handler.</TABLE><H2>Description</H2> Xlib generally calls the program'ssupplied error handler whenever an error is received.It is not called on<B>BadName</B>errors from<B><A HREF="../../appendix/a.html#OpenFont">OpenFont</A></B>,<B><A HREF="../../appendix/a.html#LookupColor">LookupColor</A></B>,or<B><A HREF="../../appendix/a.html#AllocNamedColor">AllocNamedColor</A></B>protocol requests or on<B>BadFont</B>errors from a<B><A HREF="../../appendix/a.html#QueryFont">QueryFont</A></B>protocol request.These errors generally are reflected back to the program through theprocedural interface.Because this condition is not assumed to be fatal, it is acceptable for your error handler to return;the returned value is ignored.However, the error handler should notcall any functions (directly or indirectly) on the displaythat will generate protocol requests or that will look for input events.The previous error handler is returned.<H2>See also</H2><B><A HREF="XDisplayName.html">XDisplayName()</A></B>,<B><A HREF="XGetErrorDatabaseText.html">XGetErrorDatabaseText()</A></B>,<B><A HREF="XGetErrorText.html">XGetErrorText()</A></B>,<B><A HREF="../../display/opening.html">XOpenDisplay()</A></B>,<B><A HREF="XSetIOErrorHandler.html">XSetIOErrorHandler()</A></B>,<B><A HREF="XSynchronize.html">XSynchronize()</A></B>,"<A HREF="default-handlers.html">Using the Default Error Handlers</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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