I'm not sure what you mean, do you want to store the data from the ListBox using Storable, for example?

No, I didn't mean the freeze/thaw methods.

Do you want to hide the widget?

Yes, something like that. But with packForget and pack it's hard to put the widget into the same place. I thought there was another method.

# "-anchor" specifies how the information in a widget (e.g.
# text or a bitmap) is to be displayed in the widget.

I know, but this doesn't work:

my $MW = MainWindow->new();
$lb = $MW->Listbox()->pack();
$lb->configure(-anchor => 'e');
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Gives just:

Bad option `-anchor' at yy.pl line 12.
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I also tried -justify without success.