DLL文件的引用

#pragma once
#include "stdafx.h"

#ifdef API_EXPORT
#define DLL_EXPORT _declspec(dllexport)
#else
#define DLL_EXPORT _declspec(dllimport)
#endif

DLL_EXPORT int Add(int x, int y);

class DLL_EXPORT CMath {
public:
    int Sub(int x, int y);
};

#include "StdAfx.h"
#define API_EXPORT
#include "Math.h"

int Add(int x, int y) {
    return x+y;
}

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

#include "stdafx.h"
#include "..\\DllUsage\Math.h"
#pragma comment(lib, "..\\DllTest.lib")


int _tmain(int argc, _TCHAR* argv[])
{
    CMath math;
    int a = math.Sub(7, 3);
    int sum = Add(4, 5);
    printf("%d %d\n", sum, a);
    getchar();
    return 0;
}