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key_defined 3x 2025-10-04 ncurses 6.5 Library calls

key_defined(3x)                  Library calls                 key_defined(3x)

NAME

       key_defined - obtain key code for an ncurses function key definition

SYNOPSIS

       #include <curses.h>

       int key_defined(const char * definition);

DESCRIPTION

       The  key_defined  ncurses  extension  permits  a  curses application to
       determine the function key code, if any, to which the string definition
       is bound.

RETURN VALUE

       key_defined returns the first key code to which definition is bound  if
       any  exists.  If none does, it returns 0.  If definition is a prefix of
       another bound definition, key_defined returns -1.

EXTENSIONS

       key_defined is an ncurses extension.

PORTABILITY

       Applications employing ncurses extensions should condition their use on
       the visibility of the NCURSES_VERSION preprocessor macro.

AUTHORS

       Thomas Dickey