>But you cannot add the custom methods (if you need them) to the instance of the default VFP class and can add the custom properties only at runtime with AddProperty method.

Ahhh... I got it. So, if I ever need an object that has custom properties or methods I must create a class and an instance. I wonder why? Seems like it would be handy for a couple reasons. First just to have it without the class link if you needed it, and second so the object could be tested fully then saved as a class if it was needed elsewhere. Oh, well... Thanks Nick!