Hi,I found the tip on how to add the select similar option that ACA has to plain autocad herehttp://www.cadforum.cz/cadforum_en/qaID.asp?tip=6365the tip tells u to create a button or a shortcut menu with the following command as macro(cadr(sssetfirst nil (ssget"_X"(list(cons 0(cdr(assoc 0(entget(car(entsel"\nSelect object and all similar: "))))))))))the string of commands works fine when I paste it in the command line, but when I create a button or a shortcut menu entry for this, the string is entered only this way(cadr(sssetfirst nil (ssget"_X"(list(cons 0(cdr(assoc 0(entget(car(entsel"missing the last part of the string and thus making the command not workany clues? I am using AutoCAD 2010.Thanks

You can define a function in a LSP file loaded through a MNL file or ACADDOC.LSP. Then simply call that function:
 
(defun XXX ()
 (cadr(ssetfirst .....)
)
 
(XXX)
 
Please note that the Subscription Advantage Pack for AutoCAD 2010 (plus version 2011...) already contains the [CMD]SELECTSIMILAR[/CMD] command.