Dim instance AsIShapeBase
instance.RerouteConnections()
Remarks
Reroutes connectors so that they take the shortest possible path between the shapes they connect. To do this, the RerouteConnections method may detach the ends of a connector and reattach them to different connecting sites on the connected shapes. If this method is applied to a connector, only that connector will be rerouted. If this method is applied to a connected shape, all connectors to that shape will be rerouted.