How about you show us some sample code? Most people who need a GUI for Perl choose Tk, GTk or one of the other cross platform GUI libraries. You may find you get more help if you can switch to one of those GUIs rather than trying to force Perl into the role of a Windows GUI app. Apart from anything else it is generally much quicker to use something like Tk to get a GUI app going with Perl (so long as it doesn't need to look pretty).

Hi Thanks for your quick response. I am using Tk-MDI-0.2 for Perl which is available from CPAN.
I am sorry for not posting the sample code and here it is.

use strict;
use warnings;
use Tk;
use Tk::MDI;

my $mw = tkinit;
my $mdi = $mw->MDI(
        -style=>'win32',
        -background=>'gray');

        
my $child1 = $mdi->add;
my $text = $child1->Text->pack;
$text->insert('end',"A text widget");

my $child2 = $mdi->add(-titletext=>'Listbox Title');
my $mbar = $child2 -> Menu();
$child2 -> configure(-menu => $mbar);
my $submenu = $mbar -> cascade(-label=>"OPTIONS", -underline=>0, -tear
+off =>0);
$submenu -> command(-label => "FILE", -underline=>0);
$submenu -> command(-label => "EDIT", -underline=>0);
    
my $lb = $child2->Listbox->pack;
$lb->insert(0,"A Listbox");
 
MainLoop;
[download]


When I run the above code no error messages received but the menu will not appear in the child Window. Hope you Monks will help me in resolving this issue.

AFAICT, the child widgets are not exactly windows, but frames that have a window-like appearance and movability, that give them the appearance of windows. As such, adding a menubar isn't going to work anymore than adding one to a button.

Stop saying 'script'. Stop saying 'line-noise'.
We have nothing to lose but our metaphors.