My original solution was sort of over kill, this one is much better and simpler:

use Tk;
use Tk::DialogBox;

my $mw = new MainWindow();
my $content;
my $text = $mw->Text()->pack();
my $ok = $mw->Button(-text => "OK", -command => \&grab)->pack();
MainLoop;
print $content;

sub grab {
    $content = $text->Contents();
    $mw->destroy();
}

[download]

In reply to Re^3: Grabbing Text widget's contents after MainLoop by pg
in thread Grabbing Text widget's contents after MainLoop by GrandFather

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