Let's take Chmrr's example one step further... Here's a snippet of code that I use in one of my programs:

sub _usr_next {
    $window_hash->{main}{children}{label}->configure(-textvariable, $w
+indow_hash->{main}{children}{text});

}
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The configure method will set the parameter (in this case, -textvariable), to a new value. You can also use the get method to retrieve the value. So, let's say you need to update a label. You could make a button that calls the sample code as a callback. In total, it would look something like this. WARNING: UNTESTED!!!

#/usr/bin/perl -w
use strict;
use Tk;

my $window_hash = {};

$window_hash->{main}->{main} = new MainWindow();
$window_hash->{main}->{children} = {};
$window_hash->{main}->{children}->{frame} = $window_hash->{main}{main}
+->Frame()->grid(-column, 0, -row, 0, -sticky, 'news');

$window_hash->{main}->{globals}->{test1} = "hi";
$window_hash->{main}->{globals}->{test2} = "there";

$window_hash->{left_label} = $window_hash->{main}->{children}->{frame}
+->Label(-textvariable, $window_hash->{main}->{globals}->{test1})->pac
+k(-side, 'left');

$window_hash->{right_label} = $window_hash->{main}->{children}->{frame
+}->Label(-textvariable, $window_hash->{main}->{globals}->{test2})->pa
+ck(-side, 'right');

$window_hash->{test_button} = $window_hash->{main}->{children}->{frame
+}->Button(-command, \&_usr_next())->pack(-side, 'bottom');

MainLoop;

sub _usr_next {
    $window_hash->{left_label}->configure(-textvariable, $window_hash-
+>{main}->{globals}->{test2});
    $window_hash->{right_label}->configure(-textvariable, $window_hash
+->{main}->{globals}->{test1});
}
[download]

The above method of using hash of hash of hashes method of Tk objects was suggested to me by NULE. It's actually a very creative method of making windows in Tk. The garbage collector apparently uses a linked list to store the parent and child windows, so you can put them anywhere and they will be properly garbage collected. I hope the example code is some help...

Theodore Charles III
Network Administrator
Los Angeles Senior High
4650 W. Olympic Blvd.
Los Angeles, CA 90019
323-937-3210 ext. 224
email->secon_kun@hotmail.com
perl -e "map{print++$_}split//,Mdbnr;"