C++调用dll例子

extern "C"  __declspec(dllexport)  int _cdecl GetSum(int a,int b);

创建win32项目，Application type选择dll。

DLL.h

extern "C"  __declspec(dllexport)  LPWSTR _cdecl GetSum();

DLL.cpp

// DLL.cpp : Defines the exported functions for the DLL application.

//

#include "stdafx.h"

#include "DLL.h"

int GetSum(int a,int b)

{

return a+b;

}

新建控制台应用程序项目，将生成的的DLL.lib复制到相应的目录下,

配置属性->连接器->输入->附加依赖项：添加DLL.lib

// Win32ConsoleCallDLL.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include <windows.h>

#include<iostream>  

using namespace std;  

extern "C" _declspec(dllexport) LPWSTR GetOSName(); 

int _tmain(int argc, _TCHAR* argv[])

{

cout<<GetSum(1,2)<<endl;

return 0;

}