about lines startend points

i want get all lines start and end points on outline layer, there is the code

defun( apl ()
    let( (RLP symbPg symbPth allSymbols allSymbolss)
    ;print all lines startend point
    axlSetFindFilter(?enabled list("noall" "lines")
        ?onButtons list("noall" "lines"))
    allSymbols = axlGetSelSet(axlAddSelectAll())
    axlClearSelSet()
    foreach( everyLine allSymbols
            axlMsgPut("startis %L" everyLine->startEnd) ; it doesnt work
            ;axlMsgPut("startis %L" everyLine->?) ;checked it has startEnd properties
            ;axlMsgPut("startis %L" everyLine->??) ;checked it has startEnd properties  
            )
 ))

what's the right way ?  and in the skill UG there is a starEnd attribute as in image below. how could i do it ?