“Many people like the drag-able routes in the consumer facing implementation of Bing Maps. This feature basically allows you to mouse over a route-path and drag a point to a location that you want to drive past. “
Multi-waypoint routing in Bing Maps. You can have up to 25 waypoints, 27 including start point, an endpoint and up to 25 points in between within a single route-calculation. When the route is dragged the API re-calculates the route and basically adds an additional waypoint into the route.
Draggable Routes Bing Maps Demo
Source with Code with thanks to Johannes Kebeck