' From the book "Windows Server 2003 Networking Recipes"

' This code sets the local IP address
'   to a static IP of 10.0.0.100,
'   with a subnet mask of 255.0.0.0,
'   a default gateway of 10.0.0.1,
'   and a metric of 1
' ------ SCRIPT CONFIGURATION ------
strComputer = "."
strIPAddress = Array("10.0.0.100")
strSubnetMask = Array("255.0.0.0")
strGateway = Array("10.0.0.1")
strGatewayMetric = Array(1)
' --------- END CONFIGURATION ------

Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")

Set adapters = objWMIService.ExecQuery _
    ("Select * from Win32_NetworkAdapterConfiguration where IPEnabled=TRUE")

For Each a in adapters
    errIP = a.EnableStatic(strIPAddress, strSubnetMask)
    errGateways = a.SetGateways(strGateway, strGatewaymetric)
    If errIP = 0 Then
        WScript.Echo "Success! The IP address has been changed."
    Else
        WScript.Echo "Error! The IP address could not be changed."
    End If
Next