I think if you tell MapPoint to route from 1 location to another it will also give you the direction you need to go:

oRoute.Waypoints.Add oMap.FindPushpin(RoutePoint(g - 1))
oRoute.Waypoints.Add oMap.FindPushpin(RoutePoint(g))
oRoute.Calculate

From that you should be able to pick up if your going North VS South or East VS West, etc.

Hope it helps.