application switcher theming?

[Simon Steinbeiß]

hi,
one thing that i've been wondering about is whether the xfce-application-switcher (i'm
talking about what happens when you press alt+tab) is specifically themable via the
gtk-theme. i know that it is generally affected by the colors, but e.g. is it possible to
set the icon size or the background-color only for the switcher - or are the general looks
of the thing hardcoded?

thanks in advance,
simon