I have this code:

#!/usr/bin/perl

use strict;
use Tk;

my $mw = MainWindow->new;
$mw->title("Hi");

my $title = $mw->Entry( -text       => '',
                        -width      => 20,
                        -font       => 'Courier 12 bold',
                        -background => 'Orange',
)->pack( -ipadx => 35 );

$title->focus();

$mw->Button( -text       => 'Ok',
             -font       => 'Courier 12 bold',
             -background => 'Orange',
             -command    => sub{ Hello($title) },
  )->pack(   -side       => 'left',
             -ipadx      => 40
);

$mw->Button( -text       => 'Exit',
             -font       => 'Courier 12 bold',
             -background => 'Orange',
             -command    => sub { exit }
  )->pack(   -side       => 'right',
             -ipadx      => 40
);

MainLoop;

sub Hello {
    my $title_val = $title->get;
    print "Hello - $title_val\n";
}
[download]

I have been trying to do the following:

How do I tell it to position the GUI at a specific location in the screen?

After entering something in the text, if I press "Enter", I would like it to have the same effect as pressing the "Ok" button.

Also, if I press "ESC" key, I would like it to exit.

Can someone point me to the proper documentation for this?

Thanks in advance.