动态链接库的隐式动态链接和显示动态链接

创建dll工程：

#include"CustomDll.h"
#include<windows.h>
BOOL APIENTRY DLLMAIN(HMODULE hModule, DWORD reason_for_call, LPVOID lpReserved)
{
    switch (reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_PROCESS_DETACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
        break;
    }
    return TRUE;
}
int DLLFuncAdd(int a, int b)
{
    return a + b;
}

创建useDll工程，隐式动态链接：将dll工程编译好后的复制到useDll工程根目录下，然后使用如下代码

#include<windows.h>
#include"CustomDll.h"  
#include<iostream>
using namespace std;
#pragma comment (lib,"CustomDll")
int main()
{
    int c = 1, b = 2;
    cout << DLLFuncAdd(c, b) << endl;
    return 0;
}

显示动态链接：在原dll工程中点击项目，添加新项，选中模块定义文件（.def),然后名称输入dll，确定

在dll.def文件中添加如下代码：

EXPORTS
DLLFuncAdd

然后在usedll工程中进行编辑，代码如下：

#include<windows.h>
#include<iostream>
using namespace std;
typedef int(*PFNEXPORTFUNC)(int a, int b);
int main()
{
int c = 1, b = 2;
HMODULE hModule = LoadLibrary(L"CustomDll.dll");
if (hModule != NULL)
{
    PFNEXPORTFUNC mDLLFuncAdd = (PFNEXPORTFUNC)GetProcAddress(hModule, "DLLFuncAdd");
    if (mDLLFuncAdd != NULL)
    {
        cout << mDLLFuncAdd(c, b) << endl;
    }
    FreeLibrary(hModule);
}

return 0;
}

就行了。