How to get a screen shot using flash?

I need a function that a user can just click a flash app button in the browser and then submit his screen shot to a server side script.But it seems difficult to find a solution.Any suggestion will be appreciated.Th开发者_开发技巧anks.

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PLEASE no solution.

Why?

Because it would mean every stupid little flash app (on any nontrusted website) could see what I do on my screen.

Which, incidentally, would be a HUGH security risk.