>>>You couldn't (without walking the hierarchy). But since the IsMethodExistInSubClass() method is in the base class (so, by definition, you know the base class) I don't see why you need to pass it (or Me) at all. AFAICS your base class just needs to be something like this (check for non-existent method omitted):
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>After more tests on this, I have found that using assignation like this to a class name causes memory problems

Can't see why that would be happening. What exactly are you seeing ?

> and this results in unexpected behaviors at various locations. I had to put back the old code. Unless there would be a way to establish a reference to an object, for the last verification to the base class, I would have to rely on the original code.