Set the override-redirect flag for the window with the overrideredirect method before mapping it (this is documented in the Tk::Wm man page). Example:

#!/usr/bin/perl

use warnings;
use strict;
use Tk;

my $mw = tkinit;

$mw->overrideredirect(1);   # set the override-redirect flag

$mw->packPropagate(0);      # prevent the window being resized
                            # for this demo
$mw->Button(
    -text       => 'Quit',
    -command    => sub { Tk::exit(0) },
)->pack(
    -side       => 'bottom',
);

# after a delay: 
# withdraw
# clear the override-redirect flag
# re-map the window
$mw->after(
    4000,
    sub {
        $mw->withdraw;
        $mw->overrideredirect(0);
        $mw->deiconify;
        $mw->raise;
    }
);
# NB:
# "Mastering Perl/Tk" mentions that clearing
# the override-redirect flag will not cause
# the window manager to supply decorations.
# This is true, but at least on KDE, clearing
# the flag, then unmapping and mapping the
# window puts decorations in place.
#
# Your mileage may vary.

MainLoop;
[download]

converter

True, overrideredirect will remove the decorations; however, you lose functionality also.

From Wm.pod

Setting the override-redirect flag for a window causes it to be ignored by the window manager; among other things, this means that the window will not be reparented from the root window into a decorative frame and the user will not be able to manipulate the window using the normal window manager mechanisms.

One main limitation I have experienced with this is the inability to bind actions. As converter said, your mileage may vary but I don't think overrideredirect is the solution. I have mainly limited my use of the override-redirect to creating splash screens. If someone knows of a way to remove the decorations but still retain full Tk functionality, I would love to hear it.

Inelukii

I think this is more of a window manager issue than a Tk issue. From what I understand, overrideredirect simply tells the window manager not to bother with the window. Since the window manager is what's decorating the window in the first place, this accomplishes your goal. However, the window manager is then unable to do other things with the window.

---

milkbone - perl/tk instant messaging - it's the only way to fly

As with both other respondents I have also tried the override redirect method and the functionality problems aside it is a viable way of achieving what you want. It depends purely what level of GUI functionality you need. It is worth a try.

jdtoronto

Hi and thanks for all your replyes, very kind of all of you :)

I tried the overrideredirect() code, but as so many of you says, it is not worth the loss of functionality. Especially the move functionality.

wombat if find a way to move the window i would be more than glad to hear about it.