This application is used to detect the Com Port using the component TComPort. may be useful

检查某个ip地址和某个端口是否是可用！ 两个功能，先检测IP地址，后检测端口！-Check a ip address and a port if it is available! Two functions, first to detect the IP address, the detection port!

TCP端口扫描工具,可以扫描端口是否开启-TCP Port scanning,you can detect the state of the port