How to write DLL files in C++

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Three files are required, dll_demo.h, dll_demo.cpp, dll_dome.def

Code directly:

The header file is as follows:

#ifndef _DLL_DEMO_H_#define _DLL_DEMO_H_#ifdef DLLDEMO_EXPORTS#define DLL_DEMO extern "C" __declspec(dllexport) #else#define DLL_DEMO extern "C" __declspec(dllimport)#endifDLL_DEMO int __stdcall Add(int a, int b);#endif

Source documents:

#define DLLDEMO_EXPORTS#include "dll_demo.h"int __stdcall Add(int a, int b){ return (a + b);}

def file:

LIBRARYEXPORTSAdd @ 1

Functions need to be declared as stdcall call mode to be called by easy language. The main function of def file is to solve the problem that the function name is changed after using stdcall mode. Introducing def files in vs2013 requires manual additions to the project properties, linker, input, and module definition files.

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