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<HTML><HEAD><TITLE>Xlib Programming Manual: Keyboard Utility Functions</TITLE></HEAD><BODY><H1 ALIGN=center>16.1 Keyboard Utility Functions</H1>This section discusses mapping between <A HREF="../../input/keyboard-encoding.html">KeyCodes</A> and<A HREF="../../input/keyboard-encoding.html#KeySym">KeySyms</A>,classifying <A HREF="../../input/keyboard-encoding.html#KeySym">KeySyms</A>, and mapping between <A HREF="../../input/keyboard-encoding.html#KeySym">KeySyms</A> and string names.The first three functions in this section operate on a cached copy of theserver keyboard mapping.The first four <A HREF="../../input/keyboard-encoding.html#KeySym">KeySyms</A> for each <A HREF="../../input/keyboard-encoding.html">KeyCode</A>are modified according to the rules given in "<A HREF="../../input/keyboard-encoding.html">Keyboard Encoding</A>".To obtain the untransformed KeySyms defined for a key,use the functions described in section "<A HREF="../../input/keyboard-encoding.html">Keyboard Encoding</A>".<P>To obtain a <A HREF="../../input/keyboard-encoding.html#KeySym">KeySym</A> for the <A HREF="../../input/keyboard-encoding.html">KeyCode</A> of an event, use<B><A HREF="XLookupKeysym.html">XLookupKeysym()</A></B>.<P>To obtain a <A HREF="../../input/keyboard-encoding.html#KeySym">KeySym</A>for a specific <A HREF="../../input/keyboard-encoding.html">KeyCode</A>,use<B><A HREF="XKeycodeToKeysym.html">XKeycodeToKeysym()</A></B>.<P>To obtain a <A HREF="../../input/keyboard-encoding.html">KeyCode</A>for a key having a specific <A HREF="../../input/keyboard-encoding.html#KeySym">KeySym</A>,use<B><A HREF="XKeysymToKeycode.html">XKeysymToKeycode()</A></B>.<P>The mapping between KeyCodes and KeySyms is cached internal to Xlib.When this information is changed at the server, an Xlib function mustbe called to refresh the cache.To refresh the stored modifier and keymap information, use<B><A HREF="XRefreshKeyboardMapping.html">XRefreshKeyboardMapping()</A></B>.<P>To obtain the uppercase and lowercase forms of a KeySym, us<B><A HREF="XConvertCase.html">XConvertCase()</A></B>.<P><A HREF="../../input/keyboard-encoding.html#KeySym">KeySyms</A> have string names as well as numeric codes.To convert the name of the <A HREF="../../input/keyboard-encoding.html#KeySym">KeySym</A> to the KeySym code, use<B><A HREF="XStringToKeysym.html">XStringToKeysym()</A></B>.<P>To convert a KeySym code to the name of the <A HREF="../../input/keyboard-encoding.html#KeySym">KeySym</A>, use<B><A HREF="XKeysymToString.html">XKeysymToString()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="keysym-classification.html">KeySym Classification Macros</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>

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