windows c dll的创建与调用

DLL代码：

// TestDynamic.cpp: implementation of the TestDynamic class.
//
//////////////////////////////////////////////////////////////////////

#include "TestDynamic.h"
#include <windows.h>

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

BOOL APIENTRY DllMain( HANDLE hModule,   
                       DWORD  ul_reason_for_call,   
                       LPVOID lpReserved  
                     )  
{  
    return TRUE;  
}  

__stdcall int Plus(int x, int y)
{
    return x + y;
}

__stdcall int Sub(int x, int y)
{
    return x - y;
}

__stdcall int Mul(int x, int y)
{
    return x * y;
}

__stdcall int Div(int x, int y)
{
    return x / y;
}

// TestDynamic.h: interface for the TestDynamic class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_TESTDYNAMIC_H__5BBAD36E_608D_4D94_B6D6_19404806F6AE__INCLUDED_)
#define AFX_TESTDYNAMIC_H__5BBAD36E_608D_4D94_B6D6_19404806F6AE__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

extern "C" __declspec(dllexport) __stdcall int Plus(int x, int y);

extern "C" __declspec(dllexport) __stdcall int Sub(int x, int y);

extern "C" __declspec(dllexport) __stdcall int Mul(int x, int y);

extern "C" __declspec(dllexport) __stdcall int Div(int x, int y);

#endif // !defined(AFX_TESTDYNAMIC_H__5BBAD36E_608D_4D94_B6D6_19404806F6AE__INCLUDED_)

调用程序主代码:

// TestDll.cpp : Defines the entry point for the console application.
// 隐式调用

#include "stdafx.h"

#pragma comment(lib,"testDynamic.lib");

extern "C" __declspec(dllimport) __stdcall int Plus(int x, int y);
extern "C" __declspec(dllimport) __stdcall int Sub(int x, int y);
extern "C" __declspec(dllimport) __stdcall int Mul(int x, int y);
extern "C" __declspec(dllimport) __stdcall int Miv(int x, int y);

int main(int argc, char* argv[])
{
    int t = Plus(1,1); 
    printf("%d
",t);
    return 0;
}

// TestDll.cpp : Defines the entry point for the console application.
// 显式调用

#include "stdafx.h"
#include <windows.h>


typedef int (__stdcall *lpPlus)(int, int);
typedef int (__stdcall *lpSub)(int, int);
typedef int (__stdcall *lpMul)(int, int);
typedef int (__stdcall *lpDiv)(int, int);

int main(int argc, char* argv[])
{
    lpPlus myPlus;
    lpSub mySub;
    lpMul myMul;
    lpDiv myDiv;

    HINSTANCE hModule = LoadLibrary("testDynamic.dll");
    myPlus = (lpPlus)GetProcAddress(hModule, "Plus");

    int x = myPlus(1,1);
    printf("%d
",x);

    return 0;
}

PS：注意__stdcall如果DLL中没有定义为__stdcall在调用时就不要用