>Hi Craig,
>
>I checked out your KB article because I was curious as to how other people implement this. I generally use the date scheme myself (give them 30 days, and also give them a way to extend it if they call me --- I give them a 15-digit code over the phone to enter to either extend the demo period or remove it once they've paid me). The only objection you seemed to have was that there was no way to prevent them from changing the system date. You're right about that, but what I do is save the current date each time the program is run. When you do your security checks when the program first starts, you can check if the system date is less than this saved date. If so, you know someone screwed around with the system date and then I immediately expire their demo. Once it's expired, they have to call me to get it back.
>
>-Bonnie
>
>>>This is a general Query......
>>>
>>>I am creating a Product etc. and I want to have a Full Version and Trial Version Softwares. What are the Industry Standard Practices followed ? Are there any other methods ?
>>>
>>>Thanks in advance
>>>
>>>Satya
>>
>>Look at the KB article on my web site.

I can see that method. My other objection to a thirty day trial is my own experience. I install it, play with it, then get pulled off onto some fire. It's more than 30 days before I can get back to it.