Executing System Commands from VB.NET

Can anyone tell me how to execute a command as if I'm at a command prompt in VB.NET? I have an application (NSM for Unicenter) installed which will allow me to type a command at the command prompt to add text to a log file and I somehow need to run this command from my code. I know it's probably simple but I just don't see it. Thanks for any help.

Let's say you want to fire Notepad in windows :

VB Code:

System.Diagnostics.Process.Start("Notepad.exe")