[CONNECT] How to retrieve values from IECPropertyValue object

When reading EC data from an element, I can utilize IDgnECInstance.GetPropertyValue("myProprty") to return an IECPropertyValue. That class has methods for returning some data types like StringValue, DoubleValue, and IntValue. How do you "grab" other possible data types (like boolean, long, Point3d, ECArray, etc). Would that be "NativeValue"?

Thanks,

Bruce