.\" $OpenBSD: key_defined.3,v 1.2 2023/10/17 09:52:08 nicm Exp $
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.\" Copyright 2018-2021,2022 Thomas E. Dickey                                *
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.\" Author: Thomas E. Dickey 2003
.\"
.\" $Id: key_defined.3,v 1.2 2023/10/17 09:52:08 nicm Exp $
.TH key_defined 3 2022-02-12 "ncurses 6.4" "Library calls"
.SH NAME
\fBkey_defined\fP \- check if a keycode is defined
.SH SYNOPSIS
\fB#include <curses.h>\fP
.sp
\fBint key_defined(const char *\fIdefinition\fB);\fR
.SH DESCRIPTION
This is an extension to the curses library.
It permits an application to determine if a string is currently bound
to any keycode.
.SH RETURN VALUE
If the string is bound to a keycode, its value (greater than zero) is returned.
If no keycode is bound, zero is returned.
If the string conflicts with longer strings
which are bound to keys, \-1 is returned.
.SH PORTABILITY
These routines are specific to ncurses.
They were not supported on
Version 7, BSD or System V implementations.
It is recommended that
any code depending on them be conditioned using NCURSES_VERSION.
.SH SEE ALSO
\fBdefine_key\fP(3).
.SH AUTHOR
Thomas Dickey.