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<HTML><HEAD><TITLE>Xlib Programming Manual: XGetClassHint</TITLE></HEAD><BODY><H1 ALIGN=center>XGetClassHint</H1><H2>Syntax</H2><!.IN "XGetClassHint" "" "@DEF@"><CODE><PRE><B><A HREF="../../introduction/errors.html#Status">Status</A></B> XGetClassHint(<B>display</B>, <B>w</B>, <B>class_hints_return</B>) <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; Window <B>w</B>; <A HREF="wm-class.html#XClassHint">XClassHint</A> *<B>class_hints_return</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>w</B><TD> Specifies the window.<TR><TD> <B>class_hints_return</B><TD> Returns the <A HREF="wm-class.html#XClassHint">XClassHint</A>structure.</TABLE><H2>Description</H2>The<B>XGetClassHint()</B>function returns the class hint of the specified window to the membersof the supplied structure.If the data returned by the server is in the Latin Portable Character Encoding,then the returned strings are in the Host Portable Character Encoding.Otherwise, the result is implementation dependent.It returns a nonzero status on success;otherwise, it returns a zero status.To free res_name and res_class when finished with the strings,use<B><A HREF="../../display/XFree.html">XFree()</A></B>on each individually.<P><B>XGetClassHint()</B>can generate a<B>BadWindow</B> error.<H2>Diagnostics</H2><TABLE><TR><TD><B>BadWindow</B><TD>A value for a Window argument does not name a defined Window.</TABLE><H2>See also</H2><B><A HREF="XAllocClassHint.html">XAllocClassHint()</A></B>,<B><A HREF="XAllocIconSize.html">XAllocIconSize()</A></B>,<B><A HREF="XAllocSizeHints.html">XAllocSizeHints()</A></B>,<B><A HREF="XAllocWMHints.html">XAllocWMHints()</A></B>,<B><A HREF="../../display/XFree.html">XFree()</A></B>,<B><A HREF="XSetClassHint.html">XSetClassHint()</A></B>,<B><A HREF="../client-to-session-manager/XSetCommand.html">XSetCommand()</A></B>,<B><A HREF="XSetTextProperty.html">XSetTextProperty()</A></B>,<B><A HREF="XSetTransientForHint.html">XSetTransientForHint()</A></B>,<B><A HREF="../client-to-session-manager/XSetWMClientMachine.html">XSetWMClientMachine()</A></B>,<B><A HREF="XSetWMColormapWindows.html">XSetWMColormapWindows()</A></B>,<B><A HREF="XSetWMIconName.html">XSetWMIconName()</A></B>,<B><A HREF="XSetWMName.html">XSetWMName()</A></B>,<B><A HREF="XSetWMNormalHints.html">XSetWMNormalHints()</A></B>, <B><A HREF="XSetWMProperties.html">XSetWMProperties()</A></B>,<B><A HREF="XSetWMProtocols.html">XSetWMProtocols()</A></B>,<B><A HREF="XSetWMSizeHints.html">XSetWMSizeHints()</A></B>,<B><A HREF="XStringListToTextProperty.html">XStringListToTextProperty()</A></B>,"<A HREF="wm-class.html">Setting and Reading the WM_CLASS Property</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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