Thank you for contacting us.
I can point you to this
blog post that explains the basics in RadTrialFeatureReminder. I have also attached a sample application that can show you what is the expected behavior when using this control. Run the application. Then press the feature button to use the functionality. You will see the MessageBox demonstrating the functionality (in this case with FeatureId 20, because this property is set in App.xaml.cs and you can change it if you want to see the example again). You will not see a reminder because in App.xaml.cs we have:
Reminder.FreeUsageCount = 1;
Then press the feature button again. You will see the MessageBox again, but you will also be reminder that it is a trial. Press the feature button again. The scenario will repeat but one last time since its the third time you press the button and:
Reminder.AllowedTrialUsageCount = 3;
Now when you press the feature button you will only get a reminder that the trial has expired and you won't be able to see the MessageBox with the feature.
I hope this information clarifies the use of RadTrialFeatureReminder.
All the best,
the Telerik team
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