Here's a more complete example:
#!perl -w
use strict; # always
use Tk;
my $Window = MainWindow->new(-title => "Test Window");
my $uframe =$Window->Frame()
->pack(-side => 'top',
-fill => 'both',
-expand => 1);
my $dframe =$Window->Frame()
->pack(-side =>'top',
-fill => 'x');
my $txtWidget = $uframe->Scrolled("Text")
->pack(-side => 'top',
-fill => 'both',
-expand => 1);
my $pasteBtn = $dframe->Button(-text => "Paste",
-command => sub { $txtWidget->insert('end',"blah b
+lah") })
->pack(-side => 'left');
my $clearBtn = $dframe->Button(-text => "Clear",
-command => sub { $txtWidget->delete('0.0','end') }
+)
->pack(-side => 'left');
MainLoop();
Cheers,
Shendal