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<HTML><HEAD><TITLE>Xlib Programming Manual: Determining if Regions Are Empty or Equal</TITLE></HEAD><BODY><H1 ALIGN=center>16.5.4 Determining if Regions Are Empty or Equal</H1>To determine if the specified region is empty, use<B><A HREF="XEmptyRegion.html">XEmptyRegion()</A></B>.<P>To determine if two regions have the same offset, size, and shape, use<B><A HREF="XEqualRegion.html">XEqualRegion()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="locating.html">Locating a Point or a Rectangle in a Region</A></I></H5><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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