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Add-On Trial period


I want to give 30 days validity for my Add-On if it is demo version, and after getting the license Add-On should work properly with all functionality.

can any one guide me on this aspect

Thanks & Regards


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1 Answer

  • Posted on Feb 25, 2009 at 07:42 AM


    You can use any general method. There are no specific facilities in SDK to do this. Check on Google, you'll find many methods.

    Easiest is to store the installation date somewhere in the registry in encrypted form, and than checking the number of days elapsed against that date.

    Though, do keep in mind that nothing will be fool proof, and somebody really hell-bent on breaking will always be able to find out a way.


    Rahul Jain

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