use Curses::UI;
my $cui = new Curses::UI;
my $win = $cui->add('window_id', 'Window');

my $listbox = $win->add(
    'mylistbox', 'Listbox',
    -values    => [1, 2, 3],
    -labels    => { 1 => 'One',
                    2 => 'Two',
                    3 => 'Three' },
);

$listbox->onChange( sub { 
                          my $sel =  $listbox->get; 
                          endwin; 
                          print $sel; 
                          exit; 
                        } );

$cui->set_binding( sub { exit(0); } , "\cC");
$cui->mainloop;