WMI - Win32_DeviceChangeEvent - Help

Hi

I am trying to detect when a device is plugged in to removed from my computer

Start Code------------------------------
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        q = New WqlEventQuery("Select * from Win32_DeviceChangeEvent")

        w = New ManagementEventWatcher(q)

        w.Start()

    End Sub

    Private Sub w_EventArrived(ByVal sender As Object, ByVal e As System.Management.EventArrivedEventArgs) Handles w.EventArrived

        MessageBox.Show("New Arrival")

    End Sub

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_devicechangeevent.asp
End Code---------------------------------

According to this site: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_devicechangeevent.asp, Device Arrival has a value of 2 and Device Removal has a value of 3!

How do I use this information to display a different message box for value? e.g.

When the value is 2 (Device Arrival) do messagebox1.show("New Device Detected")
When the value is 3 (Device Removal) do messagebox1.show("Device Removed")

Anyone know how to do this?

Thanks