Hi Guido,
since no-one else has mentioned it, have you tried changing the
order the fields are displayed or selected in the query. It
seems that when the Primary key field is displayed FIRST, the drop
down is truncated. Or you could set the width manually, I believe.

HTH
Steve

--- In IBObjects@y..., guido.klapperich@t... wrote:
> Sorry, now I see it. But that's exactly my problem, that the
DropDownWidth is always the width of the
> LookupCombo. In my case the width of the displayfield is greater
than the dropdownwidth and then the last part
> of the data is cut off.
>
> Guido