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<HTML><HEAD><TITLE>Xlib Programming Manual: XGetWMProtocols</TITLE></HEAD><BODY><H1 ALIGN=center>XGetWMProtocols</H1><H2>Syntax</H2><!.IN "XGetWMProtocols" "" "@DEF@"><CODE><PRE><B><A HREF="../../introduction/errors.html#Status">Status</A></B> XGetWMProtocols(<B>display</B>, <B>w</B>, <B>protocols_return</B>, <B>count_return</B>) <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; Window <B>w</B>; Atom **<B>protocols_return</B>; int *<B>count_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>protocols_return</B><TD> Returns the list of protocols.<TR><TD> <B>count_return</B><TD> Returns the number of protocols in the list.</TABLE><H2>Description</H2>The <B>XGetWMProtocols()</B>function returns the list of atoms stored in the WM_PROTOCOLS property on the specified window.These atoms describe window manager protocols in which the owner of this window is willing to participate.If the property exists, is of type ATOM, is of format 32, and the atom <A HREF="/gui/x/icccm/sec-4.html#WM_PROTOCOLS">WM_PROTOCOLS</A> can be interned, <B>XGetWMProtocols()</B>sets the protocols_return argument to a list of atoms, sets the count_return argument to the number of elements in the list, and returns a nonzero status.Otherwise, it sets neither of the return argumentsand returns a zero status.To release the list of atoms, use<B><A HREF="../../display/XFree.html">XFree()</A></B>.<P><B>XGetWMProtocols()</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="../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="XSetWMProperties.html">XSetWMProperties()</A></B>,<B><A HREF="XSetWMProtocols.html">XSetWMProtocols()</A></B>,<B><A HREF="XStringListToTextProperty.html">XStringListToTextProperty()</A></B>,"<A HREF="wm-protocols.html">Setting and Reading the WM_TRANSIENT_FOR 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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