Delphi: At runtime find classes that descend from a given base class?

Well, yes, there is a way, but you're not going to like it. (Appearantly, I need a disclaimer like this, to prevent my otherwise perfectly helpfull comment getting downvoted by the oh-so knowledgable, but not so forgiving 'senior' SO members.).

It can be done with RTTI, but not in Delphi 5. In order to find all classes that match a certain criteria, you first need to be able to find all classes, and the RTTI APIs necessary to do that were introduced in Delphi 2010. You'd do it something like this.

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