possible to detect if window is on active desktop, or not?

[Olivier Sessink <lists olivier pk wau nl>]

Hi all,

is it possible to detect if a window is on the current desktop of the
user? (if the user is using virtual desktops?).

I have an application that can have different documents open in diffeent
windows, and each of these windows could be on a different virtual
desktop. And I want to avoid that a dialog box is shown for a document
that is not on the current virtual desktop. So I only want to give dialogs
for windows that are on the current desktop.

thanks,
        Olivier Sessink