Command Forward & Backward

What are the lisp keys to many AutoCAD commands being able to used two ways? E.g., the move command.

You can select the object, and then start the move command; or you can start the move command, and then select the object.

I'd like to place this functionality into a routine I'm writing with the copy command.

Can someone help, or direct me to a web site or article that answers this question?

Thanks,

Jamie

 

Autocad's "PICKFIRST" Variable controls whether you have to select and object before envoking the command.
Pickfirst = 1 allows you to select object then move
Pickfirst = 0 you must envoke command first

Hope this helps!

 

(or (setq ss (ssget "I"))
(setq ss (ssget))
)

 

Thanks for the replies.

Rad_Cadder, thanks for the info on Pickfirst. I still need to find out if it applies here (if it needs to be added within my code).

Jeff, I tried adding your lines into my code and am still facing some problems. As it is, there isn't a pause when I enact the command first. Do I simply need to use the pause function, or is my problem elsewhere? Do I need to use the if function?

I'd appreciate any help/direction. I've attached my attempted code.

Thanks,

Jamie

;Routine to copy an object from 0,0 to 0,0,
;and then to erase the previous object.
;
;Jamie
;9-10-04
;
(defun c:coperp ()
(or
(setq x (ssget "L"))
(setq x (ssget))
)
(command "copy" x "" "0,0" "0,0")
(command "erase" "p" "")
(princ)
)

 

(ssget "L") will select the last object drawn, so there's no reason for the
routine to pause unless you're in an empty drawing -- in which case there's
nothing to copy anyway. If you use (ssget "I") (letter 'eye'), as in C.
Witt's example, then it will use a highlighted selection set if pickfirst =
1 and there *are* objects preselected, or it will pause for input if not.
___

 

Thanks, Paul.

I guess I misread Jeff's post. Should've copied and pasted.

I'll try the letter "I" (eye), and hope for improved results.

Thanks for replying,

Jamie