limit trial use of xls programs for prospective purchasers

D

Don

How do I limit the use period of my xls created programs for trial by
prospective purchasers?
 
D

David C. Holley

If memory serves, its possible to password protect the macros in an
Excel book. If so, create a routine that only allows the book to be
opened upto a certain date. You'll have to hard code the date which is
why I raise the issue of the password. When I client requests a trial
copy you would go in, unlock the macros change the date, lock them and
send the file. Assuming of course that the password protect exists, its
been 3-5 years since I had to dig into Excel like that.
 
V

Vacation's Over

search HELp > Addin

With delivery as an Add In there are many ways to accomplish security and
Shelf life"

Just remember in VBA you can only protect from the "non-professionals",
hackers still hack

best security for shelf life is Auto delete if Now() > some futuredate
I prefer to delete most of the Add in code and leave some "please call me"
messaging for prospects.
 
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