I'd prefer hiding and then showing again over destroying and reconstructing; it's probably faster, and preserves state (such as when the user resized or moved the window).

Thanks for your sugestion.

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

my $mw = tkinit;

my $top = $mw->Toplevel();
$top->configure(-title=>'Fruit Menu');

my $ls_show_fruit = $top->Scrolled('Listbox', 
         -relief=>'groove',
         -width=>'20',
     -height=>5,
        -scrollbars=>'se' ,
         -selectmode =>'single'
    )->pack(-side=>'left',-anchor=>'sw');

$ls_show_fruit->insert('end',"apples");
$ls_show_fruit->insert('end',"oranges");
$ls_show_fruit->insert('end',"peaches");

$top->Button(-text => 'Ok',
             -command => sub{ 
             $top->withdraw;
             $mw->deiconify;
             $mw->raise;
             
             })->pack();

$top->withdraw;


$mw->Button(-text=> 'select_fruit',
     -command => sub{
         $top->deiconify;
         $top->raise;
         $mw->withdraw;      
            
       })->pack;

MainLoop;
[download]

Again from the Back button

A back button suggests you might want to use Tk::Wizard

I'll look into this option as well.Thanks for your suggestion