Re: error C2898: HRESULT IUnknown::QueryInterface(Q**p) : member function templates cannot be virtual

"Igor Tandetnik" <>
Wed, 22 Aug 2007 07:00:16 -0400
"tom" <> wrote in message

So, your advise is to give up with __interface and use just struct,
but why ? Isn't '__interface' supposed to work with COM

I know __interface is used in attributed ATL code. Attributed ATL is
broken beyond repair and should not be used. If you are using it, I
highly recommend you stop now and redo your project as regular
non-attibuted one.

I don't know what __interface does in non-attributed code, and frankly I
don't really care. There doesn't seem to be a point in using it.

I have a bigger problem- on this machine even standard ATL project
doesn't compile ( the same error as above ), but on the second one
everythng goes with no problems. The only difference is in
preprocessed unknwn.h file - it is something like that:

typedef struct IUnknown IUnknown; // ok
typedef __interface IUnknown IUnknown; // this one doesn't compile.

I'm not sure I understand. Did you edit unknwn.h and replaced struct
with __interface? And if so, why on earth would you do such a thing?
With best wishes,
    Igor Tandetnik

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