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Comprehensive COM - The Five Volume Series
by Badri Malynur and Doug Rosenberg | |
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Welcome to Comprehensive COM!
Comprehensive COM is a set of 6 CD-ROM multimedia tutorials which provide a comprehensive but more importantly comprehensible look at COM. The Component Object Model (COM) has become the foundation of new Windows technologies. A good understanding of COM is vital to all Windows programmers. This set gives you insight into the design philosophies and concepts underlying COM. Unlike any other book or course in the market, this set takes the student from the basic fundamentals and rationale of COM to the most recent developments in COM including Microsoft Transaction Server and COM+. COM is discussed without using any frameworks in earlier volumes. We will take a look at COM from both a client and a server perspective. The emphasis is to introduce the rationale for various COM techniques to prepare you for later volumes which take a detailed look at using COM using the two popular C++ frameworks Microsoft Foundation Classes (MFC) and ActiveX Template Library (ATL). You will understand the tradeoffs involved in choosing one of these frameworks. The last volume will also look at developing COM objects using Visual Basic and Java. You will also get an in-depth introduction to the COM remoting architecture, COM security and good COM design techniques. Extensive pictures and code examples reinforce the concepts. Pointers to additional resources and web sites will provide you a framework for further learning. Volume One: Fundamentals of COM -- Part One Click here to view sample screens!
The first volume takes a look at COM from a client's perspective. It starts off by providing the rationale for COM and compares the solutions provided by COM with techniques used in the pre-COM era. COM is introduced in the context of other OLE and ActiveX technologies. A simple COM program is provided and then all the important COM concepts including interfaces, HRESULTS, GUIDs, ProgIDs, IUnknown interface, described in the program are discussed in detail. Finally the different types of COM servers and the steps involved in creating COM servers is discussed.
This volume crosses the client-server boundary and takes a look at COM from a server implementation perspective. The complete code for implementing in-process and local server COM objects is provided and analyzed. The code does not use any frameworks and is in raw C++. This provides a solid foundation for later volumes. This volume provides an excellent overview of IDL the Interface Definition Language used for specifying interfaces. The files generated by a MIDL compiler are analyzed and VC++ and VB examples which use these interfaces are provided. Clear concise explanations of key COM concepts including threading models and apartments are provided. COM reuse techniques aggregation and containment are introduced and the appropriate use of these technologies is discussed.
This volume takes a look at the different ActiveX technologies which are built on top of COM including automation, persistence, structured storage, connection points, monikers, uniform data transfer, ActiveX controls and drag and drop. Several interactive demonstrations drive home the use of these technologies in your application. This volume provides a detailed look at the DCOM remoting architecture, custom and standard marshalling and the OXID resolution process. Several scenarios are provided to reinforce theory discussions. This volume concludes by taking a look at COM security discussing activation security, call security, programmatic security and interface level security.
This volume starts off by discussing Microsoft Transaction Server, a server side environment for creating large scale distributed systems. Topics include an overview of MTS, Activities, Role based security, MTS transaction support and Just in time activation. This volume then takes a look at message queuing and the Microsoft Message Queuing Server. (MSMQ)
The rest of the volume is devoted to COM+ the next generation of COM. Topics in COM+ include.
ATL is a class library from Microsoft which allows you to create a variety of small fast COM objects/ActiveX controls. ATL is an excellent library to learn COM programming techniques. Many COM programmers are already using ATL and many more projects are converting to ATL. ATL provides you a lot of the boiler plate code allowing you to concentrate on the functionality provided by the COM object.
This volume takes a look at the support provided by the Microsoft Foundation Classes (MFC) for COM programming. The pros and cons of using MFC over ATL are discussed. This volume also looks at building COM objects using Visual Basic and Java.
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