Software Distibution, TrialWare & License Keys

I have written a VB6 app that I would like to distribute.  I want to be able to distibute trialware which would expire after a certain time but be renewable with an activation key.  I also want to distirbute the product to users that purchase a license in advance.  These users would be licensed to use the product for a certain period of time which would also be renewable with a valid activation key.

I have programmed a proprietary way of doing this myself but suspect that there is probably a canned package out there that can do it much more efficiently and probably much better than I can.  I have seen many examples of such products.  SoftwareKey, Sheriff, Armadillo and Oreans to name a few.  To tell the truth the websites for these product all describe mostly the same features and they are certainly features that I want.  However, I am not familiar with any of the products and would like to know of any that you have used or are using that accomplish the task and have good support.

I would also hope to recieve feedback on products that you tried but did not quit work for you and the reasons that they didn't

We cannot use web activation.  The app will be installed in some environments with no web access.

I know that there is no right answer to this question.  I would like some input and will split the points.  I have assigned a high point total because this is so important.
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Éric MoreauSenior .Net ConsultantCommented:
Hi mlcktmguy,

take a look at another one:

mlcktmguyAuthor Commented:
any others?
mlcktmguyAuthor Commented:
I appreciate the suggestion given but I was hoping for more suggestions or at least confirmation of products that have been used with success and possibly even products that were tried but did not work out.
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Éric MoreauSenior .Net ConsultantCommented:
there aren't many products like this. you named 4, I added 1 that I know.
mlcktmguyAuthor Commented:
Is there a better way to accomplish the type of distribution I am looking for?  Maybe I am going down the wrong path.
Éric MoreauSenior .Net ConsultantCommented:
Distribution is very specific to your needs. One thing for sure is that registration needs to be straighforward and easy for users (and for you too).

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