How do you do it. Should be simple I just can't find it.
Could you be a little more specific? Are you trying to hide the button? Or just the arrow on the button? Why would you want to use a dropdown with no dropdown button?
Me.cboconBinNumber.DropDownButtonDisplayStyle = Infragistics.Win.ButtonDisplayStyle.Never
and I would like the same for the wingrid combo. The reason is I hide the arrow unless my form is in edit or add mode. If it's in edit or add mode I use the list close up event to run code. Hiding the arrow keeps the user from dropping the list down unless the form is in edit or add.