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Extendable Property

Defines if a class is derivable.

Remarks

The Extendable property applies to classes and allows you to specify whether they are derivable. When this property is set to True, the class defined by this module is derivable, that is to say its name can appear in the Extends property of another class. On the other hand, if this property is set to False, the class is not derivable and its use as a parent class of another class causes a compilation error.

For technical reasons connected with the interface between the Palm OS^® system and the HB++ execution library, most predefined classes are not derivable.

If you are not familiar with object oriented programming, you can refer to the Objets and Classes chapter in the Programmer's Guide for more information.

System requirements