I've been trying all morning to figure out how to make a menu item change the background color of my window AND print text to it. The best I've figured is the code below, but when the color and text changes are applied the window blows uo. How can I fix this? 
#!/usr/local/bin/perl -w 

use 5.005; 
use Tk; 
use Tk::widgets qw/Dialog/; 
use subs qw/build_menubar fini/; 
use vars qw/$MW $VERSION/; 
use strict; 

$MW = MainWindow->new; 

my $menubar = build_menubar; 
my $Body = $MW->Frame(qw/-width 640 -height 100 -background cyan/)->pa
+ck; 

MainLoop; 

sub build_menubar { 
my $menubar = $MW->Menu; 
$MW->configure(-menu => $menubar); 
my $file = $menubar->cascade(-label => '~File'); 
$file->command(-label => "Print Text", -command => \&PrintText);
$file->command(-label => "Quit", -command => \&fini); 
$menubar;
}

sub PrintText{
my $lbl = $Body->Label(-text => "This is new text", -background => 're
+d', -width => '100', -height => '100' )->pack(-side => 'top');
}

sub fini { exit; }

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In reply to Perl/Tk menu item by Anonymous Monk

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