Re: Typelib issue

"Igor Tandetnik" <>
Wed, 13 Aug 2008 08:10:53 -0400
"George" <> wrote in message

Off the top of my head, ATL uses type information to implement
IDispatch portion of a dual interface, as well as IDispatch for an
event sink.

What do you mean "implement" IDispatch portion of a dual interface?

An interface is an abstact class with pure virtual method. To implement
an interface means to implement its virtual methods.

A dual interface derives from IDispatch. To implement a dual interface,
one has to implement the methods of this interface proper, as well as
the four methods of IDispatch, such as IDispatch::Invoke (and the three
of IUnknown, of course).

ATL is C++ template class, code is already there and just need a type
name as type parameter. I am confused what do you mean implement?

IDispatchImpl also takes a LIBID as a parameter. What do you think it's
for? You don't have to guess - just look at the source code and find

When was the last time you manually implemented IDispatch::Invoke?

You mean implement current cocolass or use typelib to implement/refer
other types?

I don't understand this question.

Any other usage for typelib beyond what we discussed?

Probably. You don't expect an exhaustive list of everything anyone could
have ever possibly used a typelib for, do you?
With best wishes,
    Igor Tandetnik

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