mirco@... schrieb:

>
> I am familiar with the basic steps of setting up a TIB_LookupCombobox
> to look up a foreign key from a different table. Now how do I allow
> that the user selects <none> in the lookup combo, so that the foreign
> key is set to NULL? Once an entry is choosen via the lookup, I can
> switch to different entries, but not back to NULL.

pressing the <DEL> (<ENTF> on german keyboards) button will clear the
selection.

Luc.