Get no.of working days in selected calendar

static void WorkingdaysInPeriod_WD(Args _args)

{

    WorkCalendarSched workCalendarSched;
   date start;
   date end;
   counter workingdays;
   counter totaldays;
   CalendarId primCalendar="Standaard";
   ;

   start=str2date("1-11-2014",123);
   end= str2Date("1-12-2014",123);

    workCalendarSched = new workCalendarSched();

    while(start<end)
   {

    totaldays++;

       if(workCalendarSched.isdateopen(primCalendar,start)==true)
           {
               workingdays++;
           }

        start++;

    }

    info(strfmt("Total days: : %1",totaldays));
    info(strfmt("Total working days: : %1",workingdays));

}