# define_key 3x

    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, and the string non-null,  other-
           wise  ERR  is  returned.  ERR may also be returned if there is insuffi-
           cient memory to allocate the data to store the definition.  If no error
           is detected, OK 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)