jon Doe
Posts: 6
Joined: 2007-03-03
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How wood u licence yr Com add-in, which u developed, so that users who hav da appropriate license key will be able to use it for a trial peroid or unlimited! |
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Andrei Smolin
Add-in Express team
Posts: 18619
Joined: 2006-05-11
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jon,
Which add-in do you mean? As to your add-ins developed with our tools, you can freely distribute your add-ins. Please, see our EULA.
Andrei Smolin
Add-in Express Team Leader |
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Jon Sutter
Posts: 4
Joined: 2006-10-21
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Jon Doe,
What we have done for our add-in is that the user must enter a license key we have sent to their email the first time they use the app. The add-in then validates that key against our web service. Their license key is tied to their email, so a given license key will not work without knowing and using the email is was generated.
When we need to do trial license keys, we will create a datasource of trial keys and track when they key was entered and set an expiration date.
Our add-in requires internet access, so we have the luxury of being able to manage our license keys via the internet.
Another method I have done in the past was to store an expiration date within the license key that is decrypted and evaluated when the app runs, which would not require internet connectivity.
I hope that helps.
Jon
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