Hi,

When UltraTextEditor goes into edit mode, it places an inbox TextBox control over itself. So all of the editing and the scrollbars that you see are really just a regular DotNet TextBox control, and unfortunately, the scrollbars of the TextBox control cannot be styled.

You might want to consider using the UltraFormattedTextEditor control, instead. It draws the text itself and the scrollbars are styleable UltraScrollBars. There are 2 caveats, though. First, the FormattedTextEditor is not built to handle a large amount of text. The second is there it lacks support for some things the Windows TextBox has like IME.