Application for two screens

munch <[email protected]>
Newsgroups gmane.comp.mozilla.devel.xpfe
Message-ID <[email protected]> 
Hi everyone,
I'm writing a little XULRunner application that's supposed to be used in debate sessions.
For this, I'd like to have one interface/window visible on the primary screen and another one on the projector. I don't think the interaction between the windows would be a problem but how can I differentiate between the two screens and allocate my windows to the right ones?
It would be great if this was still compatible with both Windows and Mac.
Any help will be greatly appreciated!
Best,
munch
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