Notification that plot window has closed [Feature Request 1719259]

[Ethan M. <merritt@u.washington.edu>]

Feature Request 1719259 asks for a mechanism to notify the
user or scripting environment that the plot window has been
closed.

In x11 this is easy, because we already receive an event from
the window manager when the window closes and can use it as a
trigger to call event_reset(). I am wondering how easy this
would be from the other interactive terminals.

How could one detect that the wxt plot window has been closed?
The aquaterm plot window?
Windows?
os2?


-- 
Ethan A Merritt