Keystrokes in a Combo Box at next position

Question

Hi,
a simple problem with a Combo Box (C/S 6i) but a great solution ? :
In a Form there is a Combo Box with 3 values: { 'AA' | 'AB' | 'BB' }.
The user wishes following selection principle:
     1. keystroke 'A' -> [ 'AA']
     2. keystroke 'B' -> [ 'AB'] that is it, ok.
But the Forms Combo Box give us : ['BB'] - every keystroke in the Combo Box is defined on first position.
Every keystroke in the Combo Box must define at next position in the item here.
Can I latch the keystrokes to define a workaround about a trigger or another solution ?
Thank you,
Friedhold

Answer 1

Thank you Grant for your suggestion.
The solution is with a 2. Item named ECHO:
-- W-L-C Trigger --
DECLARE
total_list_count NUMBER(3);
ix NUMBER(2)      :=      1;
list_element      VARCHAR2(50);
list_element_value      VARCHAR2(50);
compare VARCHAR2(50):= :GEMARKUNG; -- INPUT - Item: Combo Box
element_match      VARCHAR2(5) :=      'FALSE';
list_id           ITEM;
BEGIN
-- List Item : Combo - Box --
-- Restriction : List-value = List-element
list_id:= FIND_ITEM('GEMARKUNG');
total_list_count := Get_List_Element_Count(list_id);
-- Compare the current list item elements with the element that
-- will be added.
LOOP
list_element := Get_List_Element_Value(list_id, ix);
IF UPPER(compare) = UPPER(substr(list_element,1,length(compare))) THEN
     element_match := 'TRUE';
     EXIT;
END IF;
EXIT WHEN ix = total_list_count;
ix := ix + 1;
END LOOP;
-- IF matched then ECHO-Item := List_Element_Value --
if element_match='TRUE' then
     :ECHO:= list_element;
end if;
bell;
END; -- W-L-C Trigger --
The user can see the founded value from the List Item (Combo Box) in the ECHO Item.
Kind Regards
Friedhold