how to implement an XX day evalutation period

  • Thread starter Thread starter Benny Raymond
  • Start date Start date
B

Benny Raymond

Does anyone know what is normally checked when writing evaluation
software and implementing that evaluation to expire after 30 days?

I thought about adding a registry key, but that seems too easy to find.
I also thought about checking the date of the executable, but then an
uninstall/reinstall would work.

Any ideas?
 
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reccommend a third-party solution that will make your life very easy.

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It's well worth it's meager cost.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
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What I do is "encode" the expiry date into a license key string.

The program reads the license key and "decodes" the expiry date back out of
it. It works for web, Windows Forms, and even webServices.

Obviously, I'm not sharing my code but any programming with an
above-room-temperature IQ ought to be able to use the idea as a starting
point for their own scheme.

Good Luck!
Peter
 
What I do is "encode" the expiry date into a license key string.
The program reads the license key and "decodes" the expiry date back
out of it. It works for web, Windows Forms, and even webServices.
Click to expand...

Good idea. Do you store it anywhere to prevent an uninstall/reinstall that
would by pass this mechanism? I've been looking for ideas on how to go
about evals in my own stuff, thus the curiosity.

Thanks,

-John
 
I'm also wondering where to store it. Right now I'm just encrypting it
and storing it in the registry, but that's pretty poor imo... i just
have no other clue of what to do with it
 
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