Auf Elemente der übergeordneten Klasse zugreifen

[Apollonius]

Zitat von Die Delphi-Hilfe:

If the declaration of a class type ends with the word class and a semicolon - that is, if it has the form

type className = class;

with no ancestor or class members listed after the word class, then it is a forward declaration. A forward declaration must be resolved by a defining declaration of the same class within the same type declaration section. In other words, between a forward declaration and its defining declaration, nothing can occur except other type declarations.