Add an Item to flip parameter?

[Lt Dan's legs]

When you

(vlax-dump-object 
 (setq [u][b]v[/b][/u] (vlax-ename->vla-object (car (entsel)))
 ) t
)

 

a flip parameter you get

; IAcadBlockFlipActionEntity: IAcadBlockFlipActionEntity Interface
; Property values:
;   ActionType (RO) = "Flip"
; etc.
;   ObjectName (RO) = "AcDbBlockFlipActionEntity"
; etc.
; Methods supported:
;   ArrayPolar (3)
;   ArrayRectangular (6)
;   Copy ()
;   Delete ()
;   GetBoundingBox (2)
;   GetExtensionDictionary ()
;   GetXData (3)
;   Highlight (1)
;   IntersectWith (2)
;   Mirror (2)
;   Mirror3D (3)
;   Move (2)
;   Rotate (2)
;   Rotate3D (3)
;   ScaleEntity (2)
;   SelectionSet ()
;   SetSelectionSet (1)
;   SetXData (2)
;   TransformBy (1)
;   Update ()

 

but if you try to use

(vla-Selectionset v)

or

(vlax-invoke v 'SelectionSet)

you'll get

; error: no function definition: VLA-SELECTIONSET

 

How do I go about adding an object to the flip parameter without using command calls?

[Lt Dan's legs]

I figured it out.

 

NOTE: Use editing a dynamic block (in block editor).

 

(defun c:test ( / ss->lst action ss )
 (vl-load-com)
 (defun ss->lst ( ss flag / id lst )
   (if (eq 'PICKSET (type ss))
     (repeat (setq id (sslength ss))
       (
         (lambda ( name )
           (setq lst
             (cons
               (if flag (vlax-ename->vla-object name)
                 name
               )lst
             )
           )
         )(ssname ss (setq id (1- id)))
       )
     )
   )
 )
 (if 
   (and (or (eq 1 (getvar 'blockeditor))(prompt "\n**Must be in block editor to use!**"))
     (setq action (car (entsel "\nSelect an Action Entity: ")))
     (setq action (vlax-ename->vla-object action))
     (setq ss (ss->lst (ssget) t))
   )
   (
     (lambda ( group )
       (vlax-invoke-method action 'SetSelectionSet
         (vlax-make-variant
           (vlax-safearray-fill
             (vlax-make-safearray vlax-vbobject
               (cons 0 (1- (length group)))
             ) group
           )
         )
       )
     )
     (append
       (vlax-safearray->list
         (vlax-variant-value
           (vlax-invoke-method action 'SelectionSet)
         )
       ) ss
     )
   )
 ) (princ)
)

Edited August 26, 2011 by Lt Dan's legs
forgot vl-load-com