How to cast a Interface to a Object in Delphi

Question

In delphi 2009 I have a reference to a IInterface which I want to cast to the underlying TObject

Using TObject(IInterface) obv

Answer 1

In short: you shouldn't or add an interface with a method that returns the pointer for you. Anything else is hackery.

Note that an interface "instance" may be implemented in another language (they are COM compatible) and / or may be a stub for something out of process etc etc.

All in all: an interface instance only agrees to the interface and nothing else, certainly not being implemented as a Delphi TObject instance