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* Author: Thomas E. Dickey 1997
* @Id: define_key.3x,v 1.42 2024/03/16 15:35:01 tom Exp @
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<H1 class="no-header">define_key 3x 2024-03-16 ncurses 6.5 Library calls</H1>
<PRE>
<STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG> Library calls <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>define_key</STRONG> - define a <EM>curses</EM> keycode
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
<STRONG>int</STRONG> <STRONG>define_key(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>definition</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>keycode</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
This is an extension to the <EM>curses</EM> library. It permits an application
to define keycodes with their corresponding control strings, so that
the <EM>ncurses</EM> library will interpret them just as it would the predefined
codes in the terminfo database.
If <EM>definition</EM> is <STRONG>NULL</STRONG>, any existing one for the keycode is removed.
Similarly, if the given keycode is negative or zero, any existing
string for the given definition is removed.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
Either <EM>keycode</EM> must be greater than zero, or <EM>definition</EM> must be non-
<STRONG>NULL</STRONG>, otherwise <STRONG>ERR</STRONG> is returned. <STRONG>ERR</STRONG> may also be returned if there is
insufficient memory to allocate the data to store the definition. If
no error is detected, <STRONG>OK</STRONG> is returned.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These routines are specific to <EM>ncurses</EM>. They were not supported on
Version 7, BSD or System V implementations. It is recommended that any
code depending on them be conditioned using <STRONG>NCURSES_VERSION</STRONG>.
</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
Thomas Dickey
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="keyok.3x.html">keyok(3x)</A></STRONG>, <STRONG><A HREF="key_defined.3x.html">key_defined(3x)</A></STRONG>
ncurses 6.5 2024-03-16 <STRONG><A HREF="define_key.3x.html">define_key(3x)</A></STRONG>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-AUTHORS">AUTHORS</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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