Styles on non-editable combos using LAF "Windows"

Hello,

when using non-editable comboboxes with LAF “Windows” I have a pretty heavy border around the field which I seem unable to modify using a Style (or manually using properties). This does not occur if the combo is editable.

I suppose it’s a Look&Feel issue, but I still would like to ask if anyone else has that problem or if there is a solution.

Thanks
Patrick