define_key - define a keycode
int define_key(char *definition, int keycode);
This is an extension to the curses library. It permits an
application to define keycodes with their corresponding
control strings, so that the curses library will interpret
them just as it would the predefined codes in the terminfo
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.
The keycode must be greater than zero, else ERR is
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
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