Why do we need “this pointer adjustor thunk”?

Question

I read about adjustor thunk from here. Here\'s some quotation:

Now, there is only one QueryInterface method, but there are two entries, one for ea

Answer 1

Here's an article on MSVC internals from one of the designers. It explains that and many other details of MSVC's implementation. You might also want to check my article on OpenRCE on how it all looks in assembly.