osx man page for define_key

define_key(3X)															    define_key(3X)

NAME
       define_key - define a keycode

SYNOPSIS
       #include <curses.h>

       int define_key(const char *definition, int keycode);

DESCRIPTION
       This is an extension to the curses library.  It permits an application to define keycodes with their corresponding control strings, so that
       the ncurses library will interpret them just as it would the predefined codes in the terminfo database.

       If the given string is null, any existing definition for the keycode is removed.  Similarly, if the given keycode is negative or zero,  any
       existing string for the given definition is removed.

RETURN VALUE
       The keycode must be greater than zero, else ERR is returned.

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.

SEE ALSO
       keyok(3X), key_defined(3X).

AUTHOR
       Thomas Dickey.

																    define_key(3X)