Programatically define TCP/IP Properties

[rcgold]

I would like to programatically modify a machines TCP/IP properties. More specifically, the static IP address, subnet mask, and default gateway.

Is there a API that supports this capability under Windows 2000 and/or Windows NT?

Also, is there an API that supports access to the adapter settings? That is, the speed (10 vs 100 mbs) and duplex mode (half vs full)?

If either of these APIs exist I would appreciate any information on how to use them including code fragments.

Thanks,

Rob

 

[markharr]

Rob,

What you want is called Windows Management Instrumentation (WMI) which is also known as Web Based Enterprise Management (WBEM). I have no practical experience with the technology but I thought I would give you a couple of pointers so that you can start.

In the case of the adapter settings, you will need to have an NDIS 5.0 specification driver for the adapter to do these operations. See here for some architectural information:

http://www.microsoft.com/hwdev/tech/network/ndis5P.asp

One thing to note, the TCP/IP configuration is in the registry at:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<Adapter GUID goes here>\IP Address

You can, in theory, diddle the registry directly. However, I believe that there is a way of doing this using WMI, but I haven't had the time to follow this right through.

Regards,

Mark