STOP 실행중인 이벤트 종료하고 다음 이벤트 실행. START-OF-SELECTION 하위 구문을 모두 종료시키고 곧바로 END-OF-SELECTION 을 실행. used to stop processing an event block, ex) If I have two events START-OF-SELECTION and END-OF-SELECTION in my program, If I use STOP keyword in START-OF-SELECTION, the keyword will exits start-of-selection and goes to END-OF-SELECTION. EXIT If you use EXIT keyword inside IF .. ENDIF., it will comes out o..