Warning: I, too, am new to the Tk parts of Perl. I have Mastering Perl/Tk at the office, but have not yet read it.

jlongino, I think that there are two problems in your code:

1. The $lb->pack( ... ) statement needs to have an extra parameter: -expand => 'yes' . This change makes it work better, but still not right.
2. The Listbox widget does not expect to have other widgets embedded in it, (it expects $lb->insert() instead), so its scrolling code does not react to the Checkbuttons you are adding. I played with it several ways, and looked at the Listbox.pm source code, and cannot see how to make this work. I could be completely wrong, though.

The code below "works"; it scrolls, it looks like what Flame asked for, and each button tracks its input separately. There may be a simpler way, though.

#!/usr/bin/perl -W
use warnings 'all';
use strict;
use Tk::Pane;     
my $mw = Tk::MainWindow->new();
my $pane = $mw->Scrolled(
  'Pane',
  -scrollbars => 'oe'
)->pack(
  -expand => 'yes',
  -fill   => 'both', # "-fill => 'y'" works, too
);

my @list;
for my $text ('A' .. 'Z') {
  my $value;
  $pane->Checkbutton(
    -anchor   => 'w',
    -text     => $text,
    -variable => \$value,
  )->pack(
    -side => 'top',
    -fill => 'x',
  );
  push @list, \$value;
}
Tk::MainLoop();

printf "%s\n", $$_||0 foreach @list;
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