代码如下：

#pragma once#include <Windows.h>using namespace std;class Test_ExportDll
{
public:typedef char* (_stdcall *Get_dll_versionPROC)(void);Get_dll_versionPROC Get_dll_version;typedef bool (_stdcall *Port_ClosePROC)(unsigned int Index);Port_ClosePROC Port_Close;Test_ExportDll(void){Get_dll_version = NULL;//动态调用HINSTANCE hIst;hIst = LoadLibrary("Test_dll.dll");if (hIst == NULL){printf("LoadLibrary failed!\n");return;}Get_dll_version = (Get_dll_versionPROC)GetProcAddress(hIst, "Get_dll_version");Port_Close = (Port_ClosePROC)GetProcAddress(hIst, "Port_Close");}};