实现一个Ftp搜索工具,对指定IP执行Ping命令查看主机存活状态，扫描主机端口，打开、添加、查询和关闭数据库，IP地址控件的使用-Realize a Ftp research tool.To a pointed IP, the function of detecting the state of host by command Ping,scaning host port, opening, adding, querying and closing database,controling IP