Creates a leader and adds it to the drawing.
objectVariable = object.AddLeader(Points, Annotation, type)
objectVariable is a Leader object;
object is one of the ModelSpace or PaperSpace collection objects or a Block object;
Points is a collection of points defining the leader line;
Annotation is a String of text or a dimension to be associated with the leader;
type is a Long integer representing one of the following LeaderType constants:
AddLeader method example