Problem concerning Vm's

Okey I looked through the FAQ section and only found a solution for how to get the vm's working.

So I got my forum to have vm's, now the problem is,how can I get my users to receive a message in the navigation bar that they have a new vm.(like when you get a new personal message,you have the "message" bar change to "new messege")

Is it possible to make that happen? What do I have to do to do it? If there is html involved then can you please give me the codes and where to put them.

I would very much appreciate if you helped me,or at least tried.

Thank you ^_^