I think that your code:
my $d = $dd->Frame()->pack();
my $n = $d->NoteBook()->pack( -expand => 0, -fill => 'x' );
should probably be something more like (untested):
my $d = $dd->add(Tk::Frame);
$d->pack;
my $n = $d->add(Tk::NoteBook);
$n->pack( -expand => 0, -fill => 'x' );
The Tk widgets are not method names, you have to pass the widget names to the add() method. Also, I believe that you should assign the widget to a variable first and then pack() it.
buckaduck
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