`Big red button' on Windows

I have some tools which I use which make a little window with a button
in it which I use to get a new instance of the tool. I do this with
something like:

    (define-interface tdb-button ()
      ()
      (:panes
       (button
	push-button
	:text "Browse directory"
	:callback-type :none
	:callback #'(lambda ()
		      (browse-directory))))
      (:layouts
       (main
	simple-layout
	'(button)))
      (:default-initargs
       :layout 'main
       :title "TDB"
       :auto-menus nil))

And then displaying one of these.

This is fine, but it has a somewhat futile decoration on it - the
normal windows title bar.  What I really want is just a button which
will sit on the desktop which I can press to get a new tool with no
decorations at all. Does anyone know how I might do that in Windows?

Thanks

--tim