动态链接库的隐式动态链接和显示动态链接

创建dll工程：

 1 #include"CustomDll.h"
 2 #include<windows.h>
 3 BOOL APIENTRY DLLMAIN(HMODULE hModule, DWORD reason_for_call, LPVOID lpReserved)
 4 {
 5     switch (reason_for_call)
 6     {
 7     case DLL_PROCESS_ATTACH:
 8     case DLL_PROCESS_DETACH:
 9     case DLL_THREAD_ATTACH:
10     case DLL_THREAD_DETACH:
11         break;
12     }
13     return TRUE;
14 }
15 int DLLFuncAdd(int a, int b)
16 {
17     return a + b;
18 }

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

 1 #include<windows.h>
 2 #include"CustomDll.h"
 3 #include<iostream>
 4 using namespace std;
 5 #pragma comment (lib,"CustomDll")
 6 int main()
 7 {
 8     int c = 1, b = 2;
 9     cout << DLLFuncAdd(c, b) << endl;
10     return 0;
11 }

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：

1 EXPORTS
2 DLLFuncAdd

然后在usedll工程中进行编辑，代码如下：

 1 #include<windows.h>
 2 #include<iostream>
 3 using namespace std;
 4 typedef int(*PFNEXPORTFUNC)(int a, int b);
 5 int main()
 6 {
 7 int c = 1, b = 2;
 8 HMODULE hModule = LoadLibrary(L"CustomDll.dll");
 9 if (hModule != NULL)
10 {
11     PFNEXPORTFUNC mDLLFuncAdd = (PFNEXPORTFUNC)GetProcAddress(hModule, "DLLFuncAdd");
12     if (mDLLFuncAdd != NULL)
13     {
14         cout << mDLLFuncAdd(c, b) << endl;
15     }
16     FreeLibrary(hModule);
17 }
18
19 return 0;
20 }

就行了。