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Active Template Library (ATL) Concepts

The Active Template Library (ATL) is a set of template-based C++ classes that let you create small, fast Component Object Model (COM) objects. It has special support for key COM features, including stock implementations, dual interfaces, standard COM enumerator interfaces, connection points, tear-off interfaces, and ActiveX controls.

If you do a lot of ATL programming, you will want to learn more about attributes, a new feature in Visual C++ .NET that is designed to simplify COM programming. For more information, see Attributed Programming.

ATL Tutorial

Leads you through the creation of a control and demonstrates some ATL fundamentals in the process.

Introduction to COM and ATL

Introduces the major concepts behind the Component Object Model (COM). This article also briefly explains what ATL is and when you should use it.

Fundamentals of ATL COM Objects

Discusses the relationship among various ATL classes and how those classes are implemented.

Dual Interfaces and ATL

Describes dual interfaces from an ATL perspective.

ATL Collections and Enumerators

Describes the implementation and creation of collections and enumerators in ATL.

Composite Control Fundamentals

Provides step-by-step instructions for creating a composite control. A composite control is a type of ActiveX control that can contain other ActiveX controls or Windows controls.

ATL Control Containment FAQ

Covers the fundamental questions related to hosting controls with ATL.

ATL COM Property Pages

Shows you how to specify and implement COM property pages.

ATL Support for DHTML Controls

Provides step-by-step instructions for creating a DHTML control.

ATL Connection Points

Explains what connection points are and how ATL implements them.

Event Handling and ATL

Describes the steps that you need to take to handle COM events using ATL's IDispEventImpl and IDispEventSimpleImpl classes.

ATL and the Free Threaded Marshaler

Provides details on the ATL Simple Object Wizard's option that allows your class to aggregate the free threaded marshaler (FTM).

Specifying the Project's Threading Model

Describes the macros that are available to control run-time performance related to threading in your project.

ATL Module Classes

Discusses the module classes new for ATL 7.0. Module classes implement the basic functionality required by ATL.

ATL Services

Covers the series of events that occur when a service is implemented. Also talks about some of the concepts related to developing a service.

ATL Window Classes

Describes how to create, superclass, and subclass windows in ATL. The ATL window classes are not COM classes.

ATL Collection Classes

Describes how to use arrays and maps in ATL.

The ATL Registry Component (Registrar)

Discusses ATL scripting syntax and replaceable parameters. It also explains how to set up a static link to the Registrar.

Programming with ATL and C Run-Time Code

Discusses the benefits of linking statically or dynamically to the C Run-Time Library (CRT).

Programming with CComBSTR

Discusses several situations that require caution when programming with CComBSTR.

ATL Encoding Reference

Provides functions and macros that support encoding in a range of common Internet standards such as uuencode, hexadecimal, and UTF8 in atlenc.h.

ATL Utilities Reference

Provides code for manipulating paths and URLs in the form of CPathT and CUrl. A thread pool, CThreadPool, can be used in your own applications. This code can be found in atlpath.h and atlutil.h.

ATL Samples

Provides descriptions of and links to the ATL sample programs.

Creating an ATL Project

Contains information on the ATL Project Wizard.

ATL Control Wizard

Discusses how to add classes.

Attributed Programming

Provides an overview on using attributes to simplify COM programming plus a list of links to more detailed topics.

ATL Class Overview

Provides reference information and links to the ATL classes.

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