Drag-n-Drop in Perl/Tkx

I'm converting Perl/Tk to Perl/Tkx and I'm struggling with getting Drag
and Drop to work in Perl/Tkx.  I had found help for DND in Perl/Tk and
use in in a large script I wrote, but for simplicity, here is a simple
Perl/Tk script that supports DND:
 
use strict;
use Tk;
use Tk::Pane;
 
my $textVariable = "my text";
 
my $mw = MainWindow->new;
my $frame = $mw->Frame()->pack(-side => 'top', -expand => 1, -fill =>
'x');
$frame->Label(-text => "My Label",
              -anchor => 'w',
              -width => 10)->pack(-ipady => 1,
                                  -side => 'left');
my $entry = $frame->Entry(-textvariable => \$textVariable,
                          -width => 40)->pack(-side => 'left');
$frame->DropSite(-dropcommand => [\&AcceptDrop, $frame],
                 -droptypes => ('Win32'));
 
MainLoop;
 

sub AcceptDrop
{
    my ($widget, $selection) = @_;
    my $filename;
 
    $filename = $widget->SelectionGet(-selection => $selection,
'STRING');
    $textVariable = $filename;
}

 
Is there an easy way to convert this simple script to use Tkx?  I know
there was a post about this in the past, but I couldn't figure out
exactly what was meant.  For example, in that post there was
 
    $interp->packageRequire('tkdnd', '2.0');
 
But $interp wasn't initialized to anything.
 
I'm using perl, v5.8.8, binary build 822.
 
Thanks,
David