|Code||Can be called by||定義|
|58||Hierarchical List - List Box||The user attempts to delete an item|
This event is generated each time a user attempts to delete the selected item(s) by pressing a deletion key (Delete or Backspace) or selecting a menu item whose associated standard action is 'Clear' (such as the Clear command in the Edit menu).
Note that generating the event is the only action carried out by 4D: the program does not delete any items. It is up to the developer to handle the deletion and any prior warning messages that are displayed.