用VC实现的PING源代码，提供了两种实现方式：1、Windows Socket；2、基于ICMP。代码总共才500多行，对于理解PING程序原理很有帮助-with VC's PING source code, provided implemented in two ways : one, Windows Socket; 2, based on ICMP. A total of code before more than 500 firms, the procedures for und