Assuming 'require Tk::TopLevel;' at txt.pl line 75
Subroutine Tk_cmd redefined at C:/Perl/site/lib/Tk/TopLevel.pm line 14 (#2)
    (W redefine) You redefined a subroutine.  To suppress this warning, say

        {
        no warnings 'redefine';
        eval "sub name { ... }";
        }

Subroutine CreateOptions redefined at C:/Perl/site/lib/Tk/TopLevel.pm line 17 (#
2)
Subroutine Populate redefined at C:/Perl/site/lib/Tk/TopLevel.pm line 22 (#2)
Subroutine Icon redefined at C:/Perl/site/lib/Tk/TopLevel.pm line 29 (#2)
Subroutine menu redefined at C:/Perl/site/lib/Tk/TopLevel.pm line 64 (#2)
Subroutine Tk::Widget::Toplevel redefined at C:/Perl/site/lib/Tk/Widget.pm line
        247 (#2)
Tk::Error: Failed to AUTOLOAD 'Tk::Widget::TopLevel' at txt.pl line 75
 [\&main::open_file]
 (menu invoke)

##</code><code>##

#!/usr/bin/perl

use warnings;
use diagnostics;

use Tk 800.000;
use Tk::Frame;
use Tk::TextUndo;
use Tk::Text;
use Tk::Scrollbar;
use Tk::Menu;
use Tk::Menubutton;
use Tk::Adjuster;
use Tk::DialogBox;


my $mw=MainWindow->new;
$mw->geometry('800x600');

my $menu_bar = $mw->Frame();
my $rf = $mw->Frame;


my $search_mb = $menu_bar->Menubutton('-text'         => 'File',
                                   '-relief'       => 'raised', 
                                   '-borderwidth'  => 2, 
                                   )->pack('-side' => 'left', 
                                           '-padx' => 2 
                                           ); 



$search_mb->command('-label'       => 'Open', 
                    '-accelerator' => 'Ctrl+o', 
                    '-underline'   => 0, 
                    '-command'     => \&open_file
                    );

$search_mb->command('-label'       => 'Save', 
                    '-accelerator' => 'Ctrl+s', 
                    '-underline'   => 0, 
                    '-command'     => \&save_file                    
		    );  

$search_mb->command('-label'       => 'Close', 
                    '-accelerator' => 'Ctrl+x', 
                    '-underline'   => 0, 
                    '-command'     => \&close_file           
		    );
$search_mb->command('-label'       => 'Exit', 
                    '-accelerator' => 'Ctrl+q', 
                    '-underline'   => 0, 
                    '-command'     => [$mw => 'destroy']
                    ); 

my($InputText) = $rf->Scrolled('TextUndo',
			       -height => '1',
			       -width => '1',
			       -scrollbars => 'osoe',
			       );




$menu_bar->pack(-anchor => 'nw');
$rf->pack(qw/-side right -fill both -expand 1/);
$InputText->pack(qw/-side top -fill both -expand 1/);

MainLoop;



sub open_file{

my $open = $mw->TopLevel;
$open->geometry('400x550');
my $tf = $open->Frame;
my $bf = $open->Frame;

$ListBox = $tf->Listbox(-height => '10',
			-selectmode => 'browse',
		        -width => '40',
		        -relief => 'sunken',
                        -setgrid => '1');

    
$ListBox->delete('0.1', 'end');

   
opendir DIR, ".";
$ListBox->insert('end', grep { -f $_ && -r $_ } readdir DIR);
close DIR;

$button = $bf->Button( -command => \&load,
			-text => 'Open');



$tf->pack;
$bf->pack;
$button->pack(-anchor => 'se');
}

sub load{
   
    my ($index) = $ListBox->curselection();

   
    my $filename = $ListBox->get($index);

    
    $InputText->Load( $filename  );

    
    (my $script = $0) =~ s,.*(\/|\\),,;

}