What I meant is that Openbox itself is just a window manager. The rest of the UI elements, like buttons, scrollbars etc. are drawn by either GTK (Gnome Like), or QT (KDE Like).
Normally, when you use Gnome or KDE, the window manager, panel etc is a part of the desktop environment, so the themes etc. match properly. When using openbox, the window manager is replaced with openbox, but the rest of the apps are still using GTK or QT. So, the themes and looks don't match as well, and need some work in order to make it match.
Edited by proton007 - 12/5/12 at 6:04pm