at t access com

special attention to the first two chapters. They are the key to learning COM. These two chapters are systematicIn a step-by-step manner. Unfortunately, this book does not include code at all levels in stages (fromAbstract The design of the basic class, followed by the separation of interface and implementation, DLLAdd, reference counting design, QueryInterface design ...). I stronglyIt is recommended that you have the desire and spirit of practice,

felt like I was playing jigsaw puzzles. Beginning with a programming language, the system eventually includes C, C + +, Java, SDK, MFC, VxD, Win32 OS, multithreading, C + + STL, Internet Protocol .... I looked at this puzzle and felt that all the changes in the world were almost in my hands. No matter what new things are being exhibited to the language, what application the framework, or what the new driver model, the new protocol, I feel that because I have mastered the basic knowledge, I have

release it. This mainly prevents the user from saving the interface pointer of the class factory, and the interface pointer is released after it is created, if you use this interface pointer to create a COM object, the memory access error will occur. Therefore, You need to lock the component and release it when it is no longer in use. 4. Who will build a factory? The

their requests in the queue and process these requests when the server load ratio is lighter; another example is that COM + provides the load balancing service, which can achieve dynamic load balancing. In addition, the load balancing feature of COM + applications does not need to be supported by coding, both client programs and component programs can be implemented in the usual way. The load balancing fea

Com -- Component Object Model (Component Object Model) is a set of software development methods and specifications proposed by Microsoft. It also represents a software development idea, that is, the idea of component-oriented programming.COM programming ideology-component-oriented programming ideology (COP) As we all know, the transition from process-oriented programming to object-oriented programming is realized from C to C ++. The emergence of

using SQLite in their own way) Database Manager Phosphatase based Phosphatase based Database Manager is available for the both components. it is written using phosphatase. it can be obtained separately or as part of other products that include it (if you have installed some of our products you may already have it-check before downloading separately ). Availability Windows 95/98/meWindow

This article provides a programming guide to the programmers who just contacted COM, explaining the inside of the COM server and how to write your own interface in C + +. Following the introduction of previous COM programming, this article discusses the content of COM servers, explains the steps and knowledge needed t

Difference Author: Sunwen translation All the best programmers do their best to make their written programs more reusable, because it allows you to quickly write more robust and scalable programs. There are two choices to make code reusable: 1. White box: The simplest one is to copy your program to another file. 2. Black box: It involves connecting a compiled piece of the program. So the compiled black box class library that the client can invoke is called a component. . NET also provides dev

Part of this section requires the reader to be familiar with the message invocation principle of COM, and the principle of this is as shown in Mr. Yang's column. Previous content: COM Server--> COM client ... COM server-->. NET Client 1, P/invoke 2, COM Interop (conten

1, the object-oriented system of the three most basic characteristics Encapsulation, polymorphism, reusability. 2, COM characteristics of the overview The encapsulation characteristics of COM objects are very thorough, all object state information must be accessible through an interface, while COM polymorphism is fully represented by the interface, and

class is not a component. During component development, classes are not necessarily unavailable, but it is easier to use classes to implement components than other methods. 5. interfaces are not always inherited. Generally, a class is used to implement all interfaces. This is simple, easy to understand, and makes it more natural to use C ++ for COM programming. 6. An interface is a function set, a component is an interface set, and a system is a set

Original article: http://www.codeproject.com/Articles/14117/COM-in-plain-C-Part-4 Use C to construct COM objects with multiple interfaces Download routine-194kb Content Embed sub-objects in our objects How the application obtains the Base Object How can an application obtain sub-objects through a base object? How can an application obtain another sub-object from a child object? How the application ob

, use component Services Explorer, or use a constant value in the component type library.? The result of the voting of a transaction can be taken by an elective reorganization.By interacting with MS DTC on behalf of a component, COM + automatically handles the rest of the complex and lengthy transaction details.Because COM + relies on MS DTC coordination transactions, a single component can perform operatio

1. DCOM The process transparency of COM is manifested in the Component object and client program can have their own process space, can also share the same process space, COM is responsible for the customer's call to the Component object correctly, and ensure the correctness of the parameters passed. Component objects and client code do not need to consider the details of the invocation delivery, as long as

Yesterday saw the first chapter of "com Essence", "com is a better C + +", feel it is necessary to do some notes, so organized into this article, I believe you deserve to have.The main content of this article is: A class faststring that implements the fast lookup function, which slowly evolves into a COM component after a small requirement. Class Faststring imple

1, the implementation of COM and operating system platform is closely related Because COM originated in the Microsoft Windows platform, the COM implementation part (that is, the COM library) uses some of the features of the Windows system directly, such as the system registry, the dynamic Connection library, and so on

Just now I went online and found another beautiful article with all the images. That's great... What theoretical knowledge of COM must be mastered when using VC for COM programming? I have seen a lot of people learn about com. After reading a book, I feel that I have a better understanding of the principles of COM, but

Delphi object-oriented Learning Article 7: COMAuthor: banhamtHttp://www.cnpack.org(Please indicate the source and keep it complete)In the previous article, we introduced interfaces. If you have never touched the COM object, you will find the interface really troublesome. You may have the idea of "It is better to define a class directly for convenience.Indeed, interfaces without com encapsulation are really

Failed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in the COM class factory. com component clsidFailed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in COM class factory When exporting data to an Excel file in the project, the following error occurs: 80070005 when the component whose CLSID is {000245

All outstanding programmers will do their best to make their programs more reusable, because it allows you to quickly write more robust and scalable programs. There are two options for code reuse: 1. white box: the simplest one is to copy your program to another file.2. Black Box: it includes connecting compiled program slices. Therefore, the compiled black box class library that can be called by the client is called a component. . Net also provides developers with methods similar to