1-3-1 about API

Main content: Introduction of API functions and related content, basic knowledge about Windows programming

The concept of 1.API functions
<1>API (Application Programming Interface), which is the application interface
It provides special functions and data structures for Windows systems for applications.

<2>win applications can call system functions with a standard number of API functions

<3> is the standard program interface between win and win applications

That is, the operating system provides the interface to the win application programmer to implement related functions

Functions of 2.API functions
<1> Window management functions: Implement window creation, movement and modification functions

<2> system service functions: implementing various functions related to the operating system

<3> Graphics Device functions: Implement device-independent graphical operation functions

3. Writing an application with API functions must first understand the following
Fundamentals of Windows Programming

1-3-1 about API