The problem is that the text doesn't show in the combobox. I presume (and I haven't tried it yet) that if I changed the text to "<sup>4</sup>" then this is what would show in the combobox and not the superscript character. The combobox isn't in a web browser its on a windows form. What I've doen is set the default font to lucida sans unicode and everything is fine, I'm almost sure it is a font issue. If i'm getting the wrong end of the stick poke me with the right end :confused: :confused::confused::confused: An optimist's glass is half full. A pesimist's glass is half empty. An engineer goes and gets the right size glass.