Using WMI to Determine which adapter(s) is connected to the internet

Question

Hi!

I am writing a VB Script that uses WMI to determine which adapter is used for internet connectivity? For example - if I have a LAN and a 3G board it needs to tell the user which is connected. I understand that a machine might have >1 internet connection, but for now, let's assume 1.

edit: Ok, how can I do this using any command tool? Given the roaring silence, I guess this is not do-able using WMI. :-) Would trace print work? I'm not too familiar with trace.

Thanks in advance for any help! Rich

Answer 1

Using Win32_NetworkAdapterConfiguration find the network device that has the lowest IPConnectionMetric, this will be the first device used for internet access.

strComputer = "."
Set objWMIService = GetObject(_
    "winmgmts:\\" & strComputer & "\root\cimv2")
Set colItems = objWMIService.ExecQuery("Select * From Win32_NetworkAdapterConfiguration")

metric = 500
description = ""

For Each objItem in colItems
    If (objItem.IPConnectionMetric < metric AND objItem.IPConnectionMetric >= 0) then
        metric = objItem.IPConnectionMetric
        description = objItem.Description
    End If
Next

Set WshShell = CreateObject("WScript.Shell")
WshShell.Popup(description)

VBScript examples for accessing the WMI can be found on MSDN