Creating Notifications For Visitor Messages?

[metalguy639]

Hello I'd like to know how I can create notifications for visitor messages. Basically what I want is when someone on your friend list posts a visitor message on their message wall you get a notification that a message has been posted. And I wonder if it would be possible to have it where it could be turned off by the member in the profile somewhere. I've run into a situation where if i post on someone's wall and they answer me on their wall I do not know they answered and have to go back and look at each one to see if they answered. It would be much easier if the system gave a notification instead.

I'm running vB 4.13 BTW.