Specifies the length of the leader on the diameter or radius dimension.
Supported platforms: Windows only
VBA:
object.LeaderLength
Type: DimDiametric, DimRadial
The objects this property applies to.
Read-only: No
Type: Double
The length of the leader.
The LeaderLength is the distance from the ChordPoint dimension definition point out to where the dimension will do a horizontal dogleg to the annotation text (or stop if no dogleg is necessary). (See the AddDimDiametric or AddDimRadial method for more information.)
VBA:
Sub Example_LeaderLength()
    ' This example creates a diametric dimension
    ' and returns the LeaderLength for that dimension.
    
    Dim dimObj As AcadDimDiametric
    Dim chordPoint(0 To 2) As Double
    Dim farChordPoint(0 To 2) As Double
    Dim leaderLength As Double
    
    ' Define the dimension
    chordPoint(0) = 5#: chordPoint(1) = 3#: chordPoint(2) = 0#
    farChordPoint(0) = 5#: farChordPoint(1) = 5#: farChordPoint(2) = 0#
    leaderLength = 1#
    
    ' Create the diametric dimension in model space
    Set dimObj = ThisDrawing.ModelSpace.AddDimDiametric(chordPoint, farChordPoint, leaderLength)
    ZoomAll
End Sub
Visual LISP:
(vl-load-com)
(defun c:Example_LeaderLength()
    ;; This example creates a diametric dimension
    ;; and returns the LeaderLength for that dimension.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Define the dimension
    (setq chordPoint (vlax-3d-point 5 3 0)
          farChordPoint (vlax-3d-point 5 5 0)
          leaderLength 1)
    
    ;; Create the diametric dimension in model space
    (setq modelSpace (vla-get-ModelSpace doc))
    (setq dimObj (vla-AddDimDiametric modelSpace chordPoint farChordPoint leaderLength))
    (vla-ZoomAll acadObj)
)