Function ncursesw::define_key

pub fn define_key(
    definition: Option<&str>, 
    keycode: KeyBinding
) -> Result<(), NCurseswError>

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 definition is None, any existing definition for the keycode is removed. Similarly, if the given KeyBinding::Unknown is negative or zero, any existing string for the given definition is removed.