获取计算机安装协议：利用Visual C++创建工程时，选择Win32 Console Application，程序运行之后是个DOS模式界面。利用WSAENumProtocols函数可以获取计算机的安装信息-Get the computer to install an agreement: the use of Visual C++ create a project, select Win32 Console Application, followed by a DOS program run mode interface. Function can access the computer using WSAENumProtocols installation information