Licensing your COM add-in - How do u?

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Licensing your COM add-in - How do u?
Need some help with doing this 
jon Doe

Posts: 6
Joined: 2007-03-03
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!
Posted 12 Mar, 2007 07:27:58 Top
Andrei Smolin

Add-in Express team

Posts: 18895
Joined: 2006-05-11

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

Andrei Smolin
Add-in Express Team Leader
Posted 12 Mar, 2007 09:31:24 Top
Jon Sutter

Posts: 4
Joined: 2006-10-21
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.


Posted 12 Mar, 2007 09:41:59 Top