#!/usr/bin/perl -w
use Tk;
$main = MainWindow->new();
$label = $main->Label(-text=>"Enter user name:");
$label->pack(-side=>"left");
$entry = $main->Entry();
$entry->bind("", \&handle_return );
$entry->pack(-side=>"left");
MainLoop();
sub handle_return {
$txt = $entry->get();
print "You entered $txt\n";
exit;
}