column tree 프로그램 예제를 보면서 열심히 짜고 있는데요

se80에서 보면 프로그램 생성 및 삭제 시 pop-up창을 선택하고

자유로이 폴더나 아이템이 삽입 혹은 삭제되잖아요..

삭제방법을 알려주시면 감사하겠습니다.

삽입구문은 아래와 같이 개발했습니다

 NODE-NODE_KEY = 'Child2'.            "#EC NOTEXT
  NODE-RELATKEY = 'Root'.
  NODE-RELATSHIP = CL_GUI_LIST_TREE=>RELAT_LAST_CHILD.
  NODE-ISFOLDER = 'X'.
  NODE-EXPANDER = 'X'. " The node is marked with a '+', although
                       " it has no children. When the user clicks on the
                       " + to open the node, the event expand_nc is
                       " fired. The programmerr can
                       " add the children of the
                       " node within the event handler of the expand_nc
                       " event  (see callback handle_expand_nc).
  APPEND NODE TO NODE_TABLE.

  CLEAR ITEM.
  ITEM-NODE_KEY = 'Root'.
  ITEM-ITEM_NAME = '1'.                " Item with name '1'
  ITEM-CLASS = CL_GUI_LIST_TREE=>ITEM_CLASS_TEXT. " Text Item
  " the with of the item is adjusted to its content (text)
  ITEM-ALIGNMENT = CL_GUI_LIST_TREE=>ALIGN_AUTO.
  " use proportional font for the item
  ITEM-FONT = CL_GUI_LIST_TREE=>ITEM_FONT_PROP.
  ITEM-TEXT = 'Objekte'.               "#EC NOTEXT
  APPEND ITEM TO ITEM_TABLE.