>Hi
>
>1. Define one Class X with properties 'Prop' PUBLIC or PROTECTED.
>2. Use 'Prop' on Code of Class.
>( typical is the case of one class to sell or to use from others )
>
>3. SubClassing Class X to Y.
>4. On Y uses Code of X
>5. On Y HIDDEN 'Prop'
>
>Result:
>Class X don't see 'Prop'
>
>Consequence -> Subclassing Black Box has BIG Limits.
>
>Click on txclass1 and txsubclass1.

I don't understand the problem here. You specifically told Fox that that was a HIDDEN property, which means that it's not accessible outside of its own class definition. So, therefore, when the Messagebox from the parent class tries to access that property, you should get an error, which I did. What do you expect to happen?

If you want the property to be accessible from related class definitions, try PROTECTED.