DBLookupComboBox NullValueKey doesn't trigger OnChange

[bpranoto]

I have a DBLookupComboBox with style csDropDownList and define Del as NullValueKey.

A complete small demo project is attached, compile and run the demo. If you press del to clear the combobox, the OnChange event should be triggered and make the EditNote control disabled. Unfortunatley, it is not the case.

Is this a bug or I miss some thing?

Thank you

[Zvoni]

IIRC, OnChange fires if the TEdit-Part of the combobox changes
Try OnClick

btw: why are you using a DBLookupcombo if you allow the user to clear the combobox?

[bpranoto]

IIRC, OnChange fires if the TEdit-Part of the combobox changes

That's why I think it's a bug, it obviously changes the TEdit part.

Try OnClick

It also doesn't work

btw: why are you using a DBLookupcombo if you allow the user to clear the combobox?

Because sometimes a field is optional, can be filled or left empty

[bpranoto]

The solution workaround is by using the OnChange event of the field.

However, I still think coding the onChange event of the TDBLookupComboBox should work as well.