Shading in Windows

[David Squance]

Hi,
I've been looking at a project which I want to release for Windows
(developed with OS X) using the windows look and feel.  There are several
scrolling fields on one card which are empty or partially so part of the
time.  The scroll bar area under windows is a rather dark grey, though it
looks quite nice in the OS X environment.  Is there some way of changing
the background of the scroll bar so that it is appears white in windows?
Thanks, Dave