This works on Linux:
my $mw = MainWindow->new();
my $text_box = $mw->Scrolled("Text", -scrollbars => 'osoe',
-relief => 'sunken',
-takefocus => 1)
->pack(-expand => 1, -fill => 'both');
$text_box->insert('end', "$_ test\n");
$text_box -> Subwidget("yscrollbar")->configure(
-background => "lightgreen",
-troughcolor => "black",
-command => \&scrollcallback,
#if you specify a scrollcallback, you will override the
#normal scroll behavior.
#restore original function
#do your stuff here
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