What is a COM object?

COM: The Component Object Model
The COM component is compiled and written according to the COM rule, and is written in the Win32 dynamic link library (DLL) or executable file (EXE) form.
The cloth can carry binary code, which is sufficient for the need for the construction of the group component. Follow the standards and standards of COM.
Applications, components and components can be operated on each other, so that they can easily establish a scalable application system. COM is
Technology standards, its commercial brand is called ActiveX.

---- In recent years, components have been widely used in software development, especially Windows DNA
It is used in the Internet to handle various types of affairs, and shows great performance. Standard receiver for component generation and access
Face-to-face discussion of group parts is not a loose case. Here, we only discuss the issue of group parts from the field that the work process should use.
Use question. The parts shall have the following special points in the development area:

---- First, the group is irrelevant to the opening of the work device. The attacker can select a specific language based on specific conditions.
The opening and release of real-time group parts. For Internet applications, components that are processed as part of a task are processed as part of the task.
Starting with MS Visual Basic is the first choice. The result is the fast release speed, and the tester will be able to compile the translated
The Group parts are deploy in binary format and can be used across Windows platforms. However, the source program sequence code is not leaked and can be effectively used.
This certifies the version right of the group sender.

---- Second, the reuse of the group is guaranteed through the interface. If a group of parts has a dry port, each port
Represents a property or method of a table group. Their other components or applications can be set or called by the procedure
For specific collections. The connection between the parts and the application process is implemented through the interface. Opening of responsibility set
The sender does not need to understand how the group component works. He only needs to create a group object in a simple manner and establish a group object with its interface.
Connection. You can change the group parts, update the version, or install the group parts in
Different systems should be used.

---- Level 3: high delivery efficiency of components, convenient use and management. Because the group parts are binary code generation, the operation efficiency
It is much higher than ASP scripts. The Computation Tasks of the core business logic shall be carried out by the components, and the ASP scripts shall only start from the group
Angular color. However, the bitwise configuration of the parts on the network can be clearly divided.
Running in different processes or on different machines. The component groups are mutually independent. MTS adds the management of the parts.
Easy to use. The groupware object manages its own storage period by using an internal quotation calculator.
When is the number of customers connected to the target image. When the value of the reference is changed to 0, the object can be removed from the inner storage.
Drop. This makes it unnecessary for programmers to consider questions related to the supply of shared resources.

---- For the purpose of making the set of parts into the producer, a group is a set of interfaces, and only has a pass through the interface.
The interface can communicate with the group parts. For the group parts, the interface contains a letter, which indicates the internal storage structure of the number of needles.
The content of several groups of elements is a number of addresses implemented by the Group. In an application procedure, the decision is used.
Is the interface of the group parts, not the group parts themselves. Only the contact ports of the parts must be kept unchanged. The parts can be upgraded or changed
However, it is not necessary to modify the process sequence. The interface is used to block specific rows.
The same method cannot be used in the same group. The same group can be used in different applications. Specific points
However, parts must be reused.