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Reply 1
thanks for your suggestion
Mauro none, Jul 10, 2010
Reply 2
That's an easy one: use the Command Pattern. This will allow you to push and pop a multi-level set of commands onto a stack.

See here for more information on Undo, Redo, Command: http://en.wikipedia.org/wiki/Undo

Hope this helps.
Walt Lynton, Jul 09, 2010
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