request for change properties all object on screen?

hi dear friends

:(i want write one easy code that , after select all object on display, change details using command properties But I did not succeed.

(defun c:test ()

(setq a (ssget "x"))

(command "select" a )

(command "properties")

)

this code not right worked.

please help me

thanks a lot

Need to use CHPROP

(defun c:test ()
(setq a (ssget "x"))
(command "CHPROP" a ....) ; you need to add what it is you want to change eg LA for layer
)

Thanks a lot dear bigal

Try this:

(defun C:test(/ cntr eset en enlist pt clr lay)
 ;Main Application
 ;Turn the command echo off
 (setvar "cmdecho" 0)
 ;Prompt the user for information
 (setq clr(acad_colordlg 1 nil))
 (setq lay(getstring "\n Layer: "))
 ; Get a selection set
 (setq eset
   (ssget
     (list
       (cons -4 "<OR")
         (cons 0 "ARC")
         (cons 0 "ELLIPSE")
         (cons 0 "INSERT")
         (cons 0 "LINE")
         (cons 0 "LWPOLYLINE")
         (cons 0 "MLINE")
         (cons 0 "MTEXT")
         (cons 0 "POLYLINE")
         (cons 0 "TEXT")
         (cons 0 "XLINE")
       (cons -4 "OR>")
     )
   )
 )
 (if (and eset (> (sslength eset) 0))
   (progn 
     ;CHANGE COLOR FOR ALL ENTITIES
     ;Change the color
     (command "change" eset "" "Properties" "Color" clr "")    
     ;
     ;CHANGE LAYER FOR ALL ENTITIES   
     ;Change the layer
     (command "change" eset "" "Properties" "LAyer" lay "")
   )
 )
 (setvar "cmdecho" 1)
 (princ)
)
(princ "\n Type test to run.")
(princ)
;;; ttray33y ;;;

thanks a lot dear ttray33y is Helpful.

 (list
       (cons -4 "<OR")
         (cons 0 "ARC")
         (cons 0 "ELLIPSE")
         (cons 0 "INSERT")
         (cons 0 "LINE")
         (cons 0 "LWPOLYLINE")
         (cons 0 "MLINE")
         (cons 0 "MTEXT")
         (cons 0 "POLYLINE")
         (cons 0 "TEXT")
         (cons 0 "XLINE")
       (cons -4 "OR>")
     )

@ ttray , This is enough

(ssget '(0 . "ARC,ELLIPSE,INSERT,LINE,LWPOLYLINE,MLINE,MTEXT,,POLYLINE,TEXT,XLINE"))