>i m not talking about the extending product validity
>suppose it shows u hav 10 days left for trial period at that time if u set system date back by 20 days or something in
>that case it shows u hav left 30 days trial period i want standrd product validity like antivius product validity
>in that if u change system date it wil differs to product validity!!!!!!!!

I haven't looked at Eric's code either, but I used to do something years and years ago (FoxPro DOS days back in the early 90's). Anyway, what I did is I kept information about the system date (stored in an encrypted file, along with everything else needed to control the trial period). If the system date ever got reset to an earlier date, the application would know it because it would compare the current system date with the previous system date that was saved and would immediately invalidate the trial period.

Yes, there may be valid reasons for changing the system date that had nothing to do with the user trying to outwit the trial period of my software, but in that case a simple phone call to me would allow them to get another "key" ... if they were entitled to one.

~~Bonnie