Tengo el siguiente código:
#!usr/bin/perl
#GoogleHack 0.3
#By Doddy H
use Tk;
use Tk::PNG;
my $ventana = MainWindow->new();
$ventana->title("GoogleHack 0.3 By Doddy H");
$ventana->geometry("370x300+20+20");
$ventana->resizable(0,0);
$ventana->Label(-font=>"Impact1",-text=>"String : ")->place(-x=>20,-y=>20);
my $v = $ventana->Entry(-text=>"Test",-width=>"31")->place(-x=>80,-y=>23);
$ventana->Button(-width=>"10",-text=>"Load",-command=>\&now)->place(-x=>278,-y=>23);
$ventana->Label(-text=>"Options",-font=>"Impact1")->place(-x=>140,-y=>70);
$ventana->Radiobutton(-text =>"Music", -value => "music",-variable=> \$op)->place(-x=>140,-y=>130);
$ventana->Radiobutton(-text =>"Programs", -value => "programs",-variable=> \$op)->place(-x=>140,-y=>160);
$ventana->Radiobutton(-text =>"Book", -value => "book",-variable=> \$op)->place(-x=>140,-y=>190);
$ventana->Radiobutton(-text =>"Videos", -value => "videos",-variable=> \$op)->place(-x=>140,-y=>220);
$ventana->Radiobutton(-text =>"Torrent", -value => "torrent",-variable=> \$op)->place(-x=>140,-y=>250);
MainLoop;
sub now {
my $test = $v->get;
my $link; ...