Multithreaded Ping Utility

It is a multithreaded ping application, at this stage at least. (the goal is to make a switch port mapper that gives you the port number and machine name on each swicth...). This application uses the clsPing class from Paulo dos santos silva modified to accept asynchronous read from the socket. I have written the application around to be multithreaded. It only accept a subnet name and will scan all the machine in this subnet reporting the response time and the DNS name.