Specifies the linetype generation of a 2D polyline or a lightweight polyline.
Supported platforms: Windows only
VBA:
object.LinetypeGeneration
Type: LWPolyline, Polyline
The objects this property applies to.
Read-only: No
Type: Boolean
This property does not apply to polylines with tapered segments.

A polyline with linetype generation set to true (left) and set to false (right)
VBA:
Sub Example_LinetypeGeneration()
' This example creates a polyline in model space and
' queries and changes the linetype generation for
' the polyline.
' To see the effect of changing the linetype generation, set
' the linetype of the polyline to something other than continuous,
' ByBlock, or ByLayer.
Dim plineObj As AcadPolyline
Dim points(0 To 14) As Double
' Define the 2D polyline points
points(0) = 1: points(1) = 1: points(2) = 0
points(3) = 1: points(4) = 2: points(5) = 0
points(6) = 2: points(7) = 2: points(8) = 0
points(9) = 3: points(10) = 2: points(11) = 0
points(12) = 4: points(13) = 4: points(14) = 0
' Create a lightweight Polyline object in model space
Set plineObj = ThisDrawing.ModelSpace.AddPolyline(points)
ZoomAll
' Find the current linetype generation for the polyline
MsgBox "The linetype generation for the polyline is: " & plineObj.LinetypeGeneration
' Change the linetype generation
plineObj.LinetypeGeneration = Not plineObj.LinetypeGeneration
plineObj.Update
MsgBox "The linetype generation for the polyline is now: " & plineObj.LinetypeGeneration
End Sub
Visual LISP:
(vl-load-com)
(defun c:Example_LinetypeGeneration()
;; This example creates a polyline in model space and
;; queries and changes the linetype generation for
;; the polyline.
(setq acadObj (vlax-get-acad-object))
(setq doc (vla-get-ActiveDocument acadObj))
;; To see the effect of changing the linetype generation, set
;; the linetype of the polyline to something other than continuous,
;; ByBlock, or ByLayer.
;; Define the 2D polyline points
(setq points (vlax-make-safearray vlax-vbDouble '(0 . 14)))
(vlax-safearray-fill points '(1 1 0
1 2 0
2 2 0
3 2 0
4 4 0
)
)
;; Create a lightweight Polyline object in model space
(setq modelSpace (vla-get-ModelSpace doc))
(setq plineObj (vla-AddPolyline modelSpace points))
(vla-ZoomAll acadObj)
;; Find the current linetype generation for the polyline
(alert (strcat "The linetype generation for the polyline is: " (if (= (vla-get-LinetypeGeneration plineObj) :vlax-true) "True" "False")))
;; Change the linetype generation
(vla-put-LinetypeGeneration plineObj (if (= (vla-get-LinetypeGeneration plineObj) :vlax-true) :vlax-false :vlax-true))
(vla-Update plineObj)
(alert (strcat "The linetype generation for the polyline is now: " (if (= (vla-get-LinetypeGeneration plineObj) :vlax-true) "True" "False")))
)