You may need Tk::Balloon as follows. 
use strict;
use Tk::Balloon;

my $b = $toplevel_wg->Balloon(-statusbar=>$toplevel_wg);
$b->attach($toplevel_wg,
               -balloonmsg => "I am on the smaller window",
               -statusmsg => "Status bar message");

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In reply to Re: How to get balloons (tooltips) on toplevel widget by biohisham
in thread How to get balloons (tooltips) on toplevel widget by merrymonk

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