COM Dual Interfaces

Posted by Tony on Stack Overflow See other posts from Stack Overflow or by Tony
Published on 2010-05-14T17:42:14Z Indexed on 2010/05/14 17:44 UTC
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com

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dual

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interface

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idispatch

A dual interface in COM is one that is able to be accessed via a DispInterface or via VTable methods.

Now can someone tell me what is exactly what the difference is between the two methods?

I thought that a VTable is a virtual table which holds the pointers to the different functions when implementing a class hierarchy which has virtual functions that can be overridden in child classes. However I do not see how this is related to a dual interface in COM?

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