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Dual Interfaces and ATL

A dual interface allows its methods to be accessed as dispinterface methods or as vtable methods. This section covers some of the features of dual interfaces from an ATL perspective.

Implementing a Dual Interface

Discusses the classes and wizards involved in implementing a dual interface.

Multiple Dual Interfaces

Discusses how to expose multiple dual interfaces on a single object.

The nonextensible Attribute

Discusses when to use the nonextensible attribute on your interface definition.

Dual Interfaces and Events

Discusses design reasons for not making an event interface a dual interface.


Provides links to conceptual topics on how to program using the Active Template Library.

Other Resources