#!/usr/bin/perl
use strict;
use Tk;

my $mw = MainWindow->new();
$mw->protocol('WM_DELETE_WINDOW', \&ExitApplication);
MainLoop();

sub ExitApplication {
    # Prepare dialog yes|no
    my $dialog = $mw->Dialog(-text => 'Do you really want to quit?',
                             -bitmap => 'question',
                             -title => 'Quit?',
                             -default_button => 'Yes',
                             -buttons => [qw/Yes No/],
                            );

    my $answer = $dialog->Show(); # and display dialog
    if ($answer =~ /y/i){
        # maybe do some cleaning up and
        exit;
    }
    else {
        # continue
    }

} # sub ExitApplication