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Dual interface in COM interoperability

Amy Frerndaz

What do you mean by Dual interface?

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Vulpes15y ago
If a COM object has a 'dual interface', it means that its methods can be invoked using either early binding (VTable) or late binding (dispinterface).

The latter is slower because the call needs to be made through the IDispatch::Invoke method and so, for most purposes, VTable methods should be preferred.
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