Break Intersecting Lines with Selection Set

(defun c:BIL (/ *error* pt1 ent ang b1 b2 useros usercmd)
(vl-load-com)
(defun *error* (msg)
(if (not
(member msg '("console break" "Function cancelled" "quit / exit abort" "" nil)))
(princ (strcat "\nError: " msg))
) ; if
(and usercmd (setvar "CMDECHO" usercmd))
(and useros (setvar "osmode" useros))
(princ)
) ; end error function
(setq useros (getvar "osmode"))
(setq usercmd (getvar "CMDECHO"))
(and
(setq ent (car (entsel "\n Select line to break ")))
(setvar "osmode" 32)
(setq pt1 (getpoint "\n Select Intersection of Lines "))
(setq ang (angle '(0 0)
(vlax-curve-getFirstDeriv ent
(vlax-curve-getParamAtPoint ent pt1)))
)
(setq b1 (polar pt1 ang 0.0625))
(setq b2 (polar pt1 (+ ang pi) 0.0625))
(setvar "osmode" 0)
(command "_.break" ent b1 b2 "")
)
(*error* "")
(princ)
){code} 

Is there a way to add a selection set to this lsp.? It works great but it would be a lot faster if I could do a selection set. I also want to still be able to modify the distances need be, because this one is set to 1/16" now but I might need to change that with other applications. If someone could help that would be great, Thanks.

BIL.LSP