Problem true/false with the command SHOW_LOV

Question

Hello,
I have a simple problem with the command SHOW_LOL
When i press an Button with this trigger:
LIST_OF_VALUES('hallo','OKI');
And my Procedire like this:
PROCEDURE list_of_values(p_lov in VARCHAR2, p_text in VARCHAR2) IS
v_lov BOOLEAN;
BEGIN
v_lov := SHOW_LOV(p_lov);
IF v_lov THEN
MESSAGE('You have just selected a '||p_text);
ELSE
MESSAGE('You have just cancelled the List of Values');
END IF;
END;
When ever i pressed the button, the procedure jumps into the else sector, but why?
Because it is true, or not?
When i alter the variable like this:
v_lov := true;
then it runs.
Can you help me?
Greetings

Answer 1

example of help forms 6i.
DECLARE
a_value_chosen BOOLEAN;
BEGIN
a_value_chosen := Show_Lov('my_employee_status_lov');
IF NOT a_value_chosen THEN
Message('You have not selected a value.');
Bell;
RAISE Form_Trigger_Failure;
END IF;
END;