>Just wondering if anyone (besides us) uses activation codes and what your thoughts on them are?
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>Our purpose for using an activation code is that it allows us to distribute a full-function demo version of our application that will stop working in 30 days. If they decide to purchase it, we can provide an activation code that will convert the demo into an unlimited version.
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>What is everyone else doing for commercial applications?

There are other commercial VFP shops that use activation codes for demos. If the prospect likes the project, any data they entered for evaluation can be used in the live package. It is also allows the vendor to extend the evaluation period. It also put the prospect on notice - buy it or loose it:-)