How to add Block Description

hi,

Is it possible to add Block Description while creating A new Block using LISP?

eg.

 
(defun c:OB(/ ssblk)
  (progn
  (setq ssblk (ssadd))
     (command "_rectangle" (list -0.35 0.00 0.00)(list 0.35 0.70 0.00))
      (setq ssblk (ssadd (entlast) ssblk))
     (command "_Line" (list -0.35 0.00 0.00)(list 0.35 0.70 0.00)"")
      (setq ssblk (ssadd (entlast) ssblk))
     (command "_Line" (list -0.35 0.70 0.00)(list 0.35 0.00 0.00)"")
      (setq ssblk (ssadd (entlast) ssblk))
     (Command "CHPROP" ssblk "" "LA" "0" "")
     (command "-BLOCK" "BSO" (list 0 0 0) ssblk "")
  )
)   
(princ)
)

I like to add Block description ( Bottom Slab Opening ) in this block please help me...

Thanks and regards

bijoy

See these threads:

http://www.cadtutor.net/forum/showthread.php?41041-Edit-Block-Description

http://www.cadtutor.net/forum/showthread.php?37888-block-description-field

http://www.cadtutor.net/forum/showthread.php?32877-Edit-Block-Description-Without-Exploding

Some food for thought:

(defun c:OB nil
 (if
   (or (tblsearch "BLOCK" "BSO")
     (progn
       (entmake
         (list
           (cons 0 "BLOCK")
           (cons 2 "BSO")
           (cons 8 "0")
           (list 10 0. 0. 0.)
           (cons 70 0)
           (cons 4 "Bottom Slab Opening")
         )
       )
       (entmake
         (list
           (cons 0 "LWPOLYLINE")
           (cons 100 "AcDbEntity")
           (cons 100 "AcDbPolyline")
           (cons 8 "0")
           (cons 90 4)
           (cons 70 1)
           (list 10 -0.35 0.0)
           (list 10  0.35 0.0)
           (list 10  0.35 0.7)
           (list 10 -0.35 0.7)
         )
       )
       (entmake
         (list
           (cons 0 "LINE")
           (cons 8 "0")
           (list 10 -0.35 0.0 0.0)
           (list 11  0.35 0.7 0.0)
         )
       )
       (entmake
         (list
           (cons 0 "LINE")
           (cons 8 "0")
           (list 10 -0.35 0.7 0.0)
           (list 11  0.35 0.0 0.0)
         )
       )
       (entmake
         (list
           (cons 0 "ENDBLK")
           (cons 8 "0")
         )
       )
     )
   )
   (entmakex
     (list
       (cons 0 "INSERT")
       (cons 2 "BSO")
       (list 10 0. 0. 0.)
     )
   )
 )

 (princ)
)

Will create the block definition if not present in the drawing and insert a block at 0,0,0.

For a reference of what all the DXF codes mean, see here.

Or in Visual LISP:

(defun c:OB ( / acdoc ) (vl-load-com)

 (setq acdoc (vla-get-activeDocument (vlax-get-acad-object)))
 
 (if (not (tblsearch "BLOCK" "BSO"))
   (
     (lambda ( block / poly line1 line2 ) (vla-put-comments block "Bottom Slab Opening")
       (setq poly
         (vlax-invoke block 'addlightweightpolyline
          '(-0.35 0.0 0.35 0.0 0.35 0.7 -0.35 0.7)
         )
       )
       (vla-put-closed poly :vlax-true)
       (vla-put-layer  poly "0")
       (setq line1 (vlax-invoke block 'addline '(-0.35 0.0 0.0) '(0.35 0.7 0.0)))
       (setq line2 (vlax-invoke block 'addline '(-0.35 0.7 0.0) '(0.35 0.0 0.0)))
       (vla-put-layer line1 "0")
       (vla-put-layer line2 "0")
     )
     (vlax-invoke (vla-get-blocks acdoc) 'add '(0. 0. 0.) "BSO")
   )
 )

 (vlax-invoke
   (vlax-get-property acdoc
     (if (= 1 (getvar 'CVPORT)) 'Paperspace 'Modelspace)
   )
   'InsertBlock '(0. 0. 0.) "BSO" 1. 1. 1. 0.
 )

 (princ)
)

Thank you so much lee & ahankhah and i would like to learn VISUAL LISP is their is any simple tutorial please let me know

thanks & regards

bijoy.v.m

A very good reference is here:

http://lee-mac.com/tutorials.html

Thanks Ahankhah...