Copy protection tool to limit number of units

Posted by Jonathan Harris on Stack Overflow See other posts from Stack Overflow or by Jonathan Harris
Published on 2009-06-11T14:04:16Z Indexed on 2010/05/28 16:01 UTC
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I have written a winform application to manage a certain type of project. I want to charge my users on a per project basis, e.g. they purchase a base version of my app to manage 3 projects for 300$ and can buy extensions for 100$ per project.

Do you know of any good tools that support this type of licensing?

Currently the project counter is buried in the database, but I am looking for something more reliable.

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