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Introduction to COM and ATL

Visual Studio 2012

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This section provides a brief introduction to COM and ATL.

Introduction to COM: Provides an overview of the Component Object Model's (COM) fundamental concepts, including interfaces, IUnknown, reference counting, QueryInterface, marshaling, and aggregation.
Introduction to ATL: Discusses, briefly, what the Active Template Library (ATL) was designed for, template libraries, and ATL version numbers. Includes recommendations for choosing between ATL and MFC.

The Component Object Model: The Windows SDK material on COM.
ATL: Provides links to conceptual topics on how to program using the Active Template Library.
ATL Class Overview: Provides reference information and links to the ATL classes.

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