how to raise a widget?

[David Pirotte <david at altosw dot be>]

hi,

does any one know how to raise a window (or dialog)

assuming that *ecalc/top-level* is either false or does hold 'a pointer'
to a previously created dialog, but the dialog would be 'in the back'
(not visible to the user, hided by another window/dialog), how can i
ask the window manager to raise it (put it in front) ?

(define (ecalc/select-gui)
  (if *ecalc/top-level*
      (begin
	;; how to raise the dialog ?
	)
      ;; let's create the dialog 
      (ecalc/gui)
      ))

thanks
david