using XUL & XPCOM

Cartoper <[email protected]>
Newsgroups gmane.comp.mozilla.license
Message-ID <[email protected]> 
I am working on a packaged software solution.  Currently it is being 
developed in Microsoft .Net and I am looking for options to take it 
cross platform.  Of all the options, I really like the idea of using XUL 
and XPCOM, the question I have is:

Do I need to release the source code?

If so, to who?  Just those that buy my software, or to anyone that 
downloads the free demo, or to the world?

Cartoper
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