It is not at all complex. It is simple. But how you want to use it will be a disaster. You're obviously determined to ignore what you've been told about the consequences.

If you're so concerned about others having access to 'your' code, etc. (which you've probably done little more with than lifting from various forums), why don't you just set up different user accounts for each user or have one for your self and a different one for everyone else???

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]