Looking at the GuestOS.ComputerName property

Virtual Server 2005 R2 SP1 added a few new bells and whistles to the COM API.  One of these is the GuestOS.ComputerName property.  This property allows you to get the network name of the virtual machine through the COM API.

Option Explicit
Dim vs, vm, vmName, vmGuestName
vmName = "Windows NT 4.0 CVS Server"
'Connect to Virtual Server 
Set vs = CreateObject("VirtualServer.Application")
'Connect to VM
Set vm = vs.FindVirtualMachine(vmName)
vmGuestName = vm.GuestOS.ComputerName 
WScript.Echo "The virtual machine " & Chr(34) & vmName & Chr(34)
WScript.Echo "Has a guest operating system configured with a network name of " & Chr(34) & vmGuestName & Chr(34)

The great thing about this is that if you want to automate a process that connects to a virtual machine over the network – and be able to handle random network names – then this will allow you to do it.