Implementazione del Ping

Dalla Knowbase ecco un paio di soluzioni su come implementare il ping

How to ping an IP address by using sockets in Visual Basic .NET
http://support.microsoft.com/default.aspx?scid=kb;en-us;828993

HOW TO: Ping an IP address with Visual Basic by using ICMP
http://support.microsoft.com/kb/300197/