slot centermark hole axis lispadd lisp 

???????

Maybe the OP is looking for a lisp to accomplish the task?  Or he has written a lisp routine to accomplish the task and is just teasing us by not sharing it.  Maybe we have to beg for the lisp?

I guess he has no answer for your ?????????????Here is a link to a slot lisp program I came across some time back.http://www.draftsperson.net/index.php?title=SLOT_Lisp_Routine

at least you gave him something to go for, even it is still not clear what he actualy wants

Hello mikemoon and all the others, eventually AutoCAD mechanical do this with the command _amslot2d. 

Unfortunately the OP's profile says he is using "tertert" which makes no sense yet he posted in the AutoCAD forum.If you are not using AutoCAD Mechanical then the lisp I linked to may be the only available option.
John Connor2016-08-18 13:44:29