Please can someone help...

I need to be able to check an ip address using vb.net.
like in command prompt i ping an ip address and get a reply or dont.

now i need to know if there is any class or available methods that i can use to check if there is a response from an ip address that i specify. so i pass it the ip address, it tells me if there is a response or not.

Please help, this is something so small and very very frustrating.