简单的Ping实现，非常简单。适合初学者delphi-Ping simple to achieve, is very simple. Suitable for beginners delphi

DDU ICMP controls consist of 3 controls : TDDUOSPING - A non blocking PING protocolTDDUOSTRACEROUTE - A non blocking TraceRoute ProtocolTDDUOSDNS - A non blocking ARP/RARP controlAbout TDDUOSDNS :Host names are resolved to IP addresses, and IP addres

用delphi编写的实现ping的源码，编译后可直接运行，采取icmp组件实现-Delphi prepared with the ping source code, the compiler can be run directly, to take ICMP components to achieve