If you can't build Gtk2, then you could use SystemTray::Applet. It doesn't require Gtk2, and it doessn't require any specialized knowledge of the user's toolkit. 
#!/usr/bin/perl 

use strict;
use warnings;
use SystemTray::Applet;

my $num = 10;
my $applet = SystemTray::Applet->new( 
    "text" => $num,
    "callback" => sub { 
        my ($self) = @_; 
        $self->{"text"} = $num;
    }
);

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In reply to Re^3: Icon generation on the fly by Khen1950fx
in thread Icon generation on the fly by chessgui

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