I would like to set the track color of the scroll bars on my grid to be a dark gray. I do not want to take over painting the entire scrollbar -- I want to UseOsThemes and just change the color of the track. If I set the colors on the ScrollBarLook they are ignored because of the theme. Is it possible to do what I am trying to do?
No, use of theming overrides everything else because the rendering is delegated to the operating system in that case.