+extern PopupMenu* make_popupmenu(TodoItem* itemdata);
+extern WINDOW* create_popup_win(TodoItem* item_info);
+extern void close_popupmenu(Menu* popupmenu_menu);
+extern MenuItem** subtasklist_to_menuitem(SubTask** subtask_list, int list_length);
+extern SubTask** menuitem_to_subtasklist(MenuItem** menuitem_list, int list_length);