Hi,

1) You can install WMI on 98 and use some thing like the GetMacAddresses
included in this post.

2) On 98 you can generate a GUID and extract the MAC address the MAC address
will be the least significant 6 bytes will be the MAC address ( Not
Recommended however ).
Contrary to popular belief, you can still use this on W2k, XP and W2k3, but
you must use UuidCreateSequential() to generate the GUID, this will require
interop. Again, just because you can do it does not mean you should.

3) If your network card has NetBIOS bound to it you can use the following
information to get the MAC Address
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q118623. This will
again require some use of interop.

Of all the options I believe option 1 to be prefereable and mention the
others for completeness.

Hope this helps

Chris Taylor
http://dotnetjunkies.com/WebLog/chris.taylor/

   private static string[] GetMacAddresses()
   {
     System.Management.ManagementClass mc =
       new
System.Management.ManagementClass("Win32_NetworkAdapterConfiguration");

     ArrayList list = new ArrayList();
     foreach ( System.Management.ManagementObject mo in mc.GetInstances() )
     {
       if ( ((bool)mo["IPEnabled"]) == true )
         list.Add( mo["MACAddress"] );
     }

     if ( list.Count > 0 )
     {
       string[] macAddresses = new string[list.Count];
       list.CopyTo( macAddresses, 0 );

       return macAddresses;
     }

     return null;
   }