Mirco,

What version of IBO are you using?

Up until a very recent version of IBO (I cant remember which), the
ComboBox csDropDown style did not work very well. I attempted to
resolve that problem and it now appears to be working properly (and as
you desire) in IBO4.2.Fb.

I have an application here with IB_ComboBox style csDropDown with only
entrys in Items (not ItemValues). The combobox is on IB_Grid and
all rows are displaying appropriate values - even those that dont
match values in the Items list.

Geoff Worboys
Telesis Computing