Windows Phone 8 Trial End Time

Question

In WP8, there is a LicenseInformation class to find out if the application is in a trial state or has already been purchased.

Now what I want to do is make my application run in trial mode for only 7 days (and end later).

MSDN docs are now somewhat misleading on this topic, so I have these questions after reading them.

• Is LicenseInformation.ExpirationDate useless for my purpose? "This API always returns 9999 - 12 - 31 (ETERNITY_FILETIME_TIME)." The trial license itself never seems to end, is that right?

• Can I use LicenseInformation.IsActive? " Can return false if the license is missing, expired, or canceled. ", " IsTrial returns true even after the trial period expires. IsActive, however, returns false after the trial period expires . " If so, how to set the expiration date?

Thanks!

Answer 1

• Yes, expiration time is always the value of DateTime.Max.

• No. This is not suitable for your needs.

There is nothing in the Trial API to enable expiration after a certain period. You must implement this functionality yourself.

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