What is an API?

Application Programming Interface)
The so-called API was originally written for C and C ++ programmers. An API is a function that is included in a dynamic connection library file attached with a DLL name. In terms of standard definition, APIs are windows 32-bit application programming interfaces and are a series of complex functions, messages, and structures, it allows programmers to compile applications running on Windows 95 and Windows NT operating systems in different programming languages. It can be said that if you have learned VC before, then the API is not a problem for you. However, if you have never learned VC or are not familiar with the Windows 95 architecture, it is very hard to learn API.
If you open the windows system folder, you can find many files with the name DLL attached to them. A dll contains more than one API function, dozens, or even hundreds. Can we all master it? The answer is no: it is impossible to grasp. But in fact, we really don't have to master it all. We only need to master the built-in API functions of the ipvs system. However, you should also discard functions that are repeated with the functions of VB itself. For example, the etattr command of VB can obtain the file attributes, and setattr can set the file attributes. There are also corresponding functions for the API.
Getfileattributes and setfileattributes have similar performance. In this case, there are 5 and 600 remaining items. Yes, there are also many. However, I can tell you that as long as you are familiar with 100, your programming level is at least twice higher than today. Although VB is closely related to windows, I think the API is closer
Windows. If you have learned the API, your first achievement is your understanding of the Windows architecture. This harvest is not easy.

 

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