Re: CoCreateInstance inside a COM dll?

"Igor Tandetnik" <>
Fri, 24 Aug 2007 17:46:31 -0400
Donos <> wrote:

Here is another problem. If i try to add BASE interfaces in
COM Entry MAP, it will give Error.
It is only letting me add the DERIVED interfaces.
This is the error that am getting,

error C2594: 'static_cast' : ambiguous conversions from
'CAllInterfaces::_ComMapClass *' to 'ITopInterface *'

Are you deriving your class from both ITopInterface and
IClientInterface? Haven't we just had a very long discussion aboout why
you shouldn't do that?

Pass where?

To client.

Why as a double pointer, and not a regular pointer?

This is actually a design requirment given to me.

This answer doesn't make any sense to me, sorry.

You don't need to cast anything. You can call methods from all of

?IMyInterface, ISecondInterface, IFirstInterface and IUnknown directly

the IMyInterface pointer.

So what type of pointer should i use? A VOID pointer?

Which part of "IMyInterface pointer" do you have difficulty

So will i need to pass a void pointer from Client also?

I have no idea what you are talking about anymore.
With best wishes,
    Igor Tandetnik

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necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
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