#!/usr/bin/perl -w
                                                                                                 
use strict;
use Tk;
use Tk::NoteBook;
                                                                                                 
my $mw = MainWindow->new();
$mw->geometry( "400x100" );
my $book = $mw->NoteBook()->pack( -fill=>'both', -expand=>1 );
                                                                                                 
my $tab1 = $book->add( "Sheet 1", -label=>"Start", -createcmd=>\&getStartTime );
my $tab2 = $book->add( "Sheet 2", -label=>"Continue", -raisecmd=>\&getCurrentTime );
my $tab3 = $book->add( "Sheet 3", -label=>"End", -state=>'disabled' );
                                                                                                 
my $starttime = '';
my $raisetime = '';
                                                                                                 
$tab1->Label( -textvariable=>\$starttime )->pack( expand=>1 );
$tab2->Label( -textvariable=>\$raisetime )->pack( expand=>1 );
$tab3->Button( -text=>'Quit', -command=>sub{ exit; } )->pack( expand=>1 );
                                                                                                 
MainLoop;
                                                                                                 
sub getStartTime {
  $starttime = "Started at " . localtime;
}

sub getCurrentTime {
  $raisetime = " Last raised at " . localtime;
  $book->pageconfigure( "Sheet 3", -state=>'normal' );
}

##</code><code>##

bad option "expand": must be -after, -anchor, -before, -expand, -fill, -in, -ipadx, -ipady, -padx, -pady, or -side at /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi/Tk/Widget.pm line 1144.
 at NoteBook.pl line 18

##</code><code>##

   # Two things going on here:
   # 1. Add configure on the front so that we can drop leading '-'
   $w->Tk::pack('configure',@_);
   # 2. Return the widget rather than nothing
   return $w;