[XForms] trapping "close window" desktop manager button?

[Michal Szymanski]

Hi,

When using a multi-form XForms application under any desktop manager
that provides a title bar button for closing the window (usually
something like X), it apparently kills the whole application which is
often undesirable (especially when clicked on a "secondary" form
window). Is there any portable (in terms of DM) way to trap such an
action?

regards, Michal.

-- 
  Michal Szymanski (msz at astrouw dot edu dot pl)
  Warsaw University Observatory, Warszawa, POLAND