Creating a virtual network card (VLAN) from a script

I'm looking for a way to create a virtual network card from a script instead
of Windows UI.. I succeeded to install the Protocol driver from a script
but didn't find a way to create new VLANs without using the UI. I used the
notify dll that comes with mux sample in WDDK.

My questions are:
- Can I expose a new method in my notify dll for adding a new VLAN, and
call it from a script?
- Is there a generic tool that makes it?
- Do you have a sample code?

Thanks Uri