Event.Value is generic return value from event processing. Event.Value assumes true. If you want to further evaluate based on a scenario:
 

Event.Value = Event.Application.IncreaseBenefitAmount > 0;

Now, Event.Value will only be true if IncreaseBenefitAmount is greater than zero.  Therefore, if you put the above code into the JScript for a form, the form will only be visible if IncreaseBenefitAmount is greater than zero.
 
You would use Event.Value instead of a "true/false" if or case statement.