Quick hack before I go to bed.

#!/usr/bin/perl

# https://perlmonks.org/?node_id=1226322

use strict;
use warnings;
use Tk;
require Tk::NoteBook;

my $main = MainWindow->new( );

my $nb = $main->NoteBook(-takefocus => 0 )->pack(-expand => 1, -fill =
+> 'both');

my $page1 = $nb->add('page1', -label => 'Page 1');

my $one = $page1->Entry()->pack();
$page1->Entry()->pack();
$page1->Entry()->pack();
my $four = $page1->Entry(-takefocus => 1)->pack();

$four->bind('<FocusIn>' => sub {$one->focus} );

$nb->add('page2', -label => 'Page 2');

MainLoop;
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