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examp18.cpp

This example is to show use of the Command pattern. There are three(3) self documenting tests that are run:

1. Create a command which converts a mixed case string to upper case. 2. Same as #1 but add a reverse command and intentionaly undo the change. 3. Add the command and reverse and a little nasty suprise to force the CommandFrame to roll-back the commands automatically because of a problem in the transaction.

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