VS2022 encapsulation under Windows dynamic library and dynamic library calls

First, create a new project MyLib (encapsulate your own dynamic library)

1. Header file Test.h: (_declspec(dllexport) should be placed in front of the exported class name, indicating that the package should be exported to the library)

#pragma onceclass _declspec(dllexport) Test{public:void say();};

2. Source file Test.cpp:

#include "Test.h"#includevoid Test::say() {std::cout << "Hello! My name is linyu!" << std::endl;}

3. Right-click on project properties -> configuration properties -> configuration type (modified to dynamic library.dll):

4. Right-click to generate, a dynamic library will be generated (two files will be generated, one is dll, the other is lib, lib is the index address information of the function entry, and the dll is the real implementation of the function)

Second, create a new project TestMyLib (call the library just packaged)

1. Copy the header file Test.h to the source file directory of the project

2. Go back to the project, header file -> right click -> add existing item Test.h

3. Copy the dynamic library file MyLib.dll to the directory where the exe is generated:

4. Linker->General->Additional library directory, link to the directory where MyLib.lib is located:

5. Linker->Input->Additional dependencies, add the generated library name MyLib.lib

6. Write the TestMyLib.cpp file:

#include #include "Test.h"int main(){Test t;t.say();}

7. Click to run