How to establish a trial period?

[Nathan Gutman]

I want to a establish a trial period of 30 days from the day the user
first opened the workbook. The user will not need a password when
opening the workbook within those 30 days. After that he will need a
password to use the application.
I have received some excellent advice on the password issue.
Does anyone have any ideas how to do the trial period?
Thanks,
Nathan

 

[pfsardella]

I had planned to provide similar functionality, so I collected some
links on the subject. I never did, so I can't attest to one method or
another.

http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=88914f2a1ff0506a&rnum=1
http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=ed4b3581cc341ef8&rnum=2
http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=c6524cf20f48af05&rnum=1
http://www.google.com/groups?hl=en&...-8&safe=off&selm=eTW6FRilBHA.1608@tkmsftngp04
http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=ecf7523adff4fa2e&rnum=5
http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=8f50fe130bbbfde7&rnum=28
http://www.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&safe=off&th=9bb66eff435a9880&rnum=35

HTH
Paul