Hi,
That sounds like a bug to me. But if I may ask, why are you using an UltraCombo? You can report this to Infragistics Developer Support here:
Submit a Support Issue
The best way to add a dropdown list to a grid cell/column is to use an UltraDropDown control and assign it to the ValueList property of the column. You might want to try that and see if it works any better.
Maciej Pietruszka said:Tnx Mike, I know you recommend UltraDropDown instread of UltraCombo but I need embended button functionallity I'll try prepare sample project showing where the problem is and will rise ticket in support than.
Ah, okay, if you need an editor button, then you have to use the Combo. :)