From: Brett M. Bergquist <bbergquist_at_canoga.com>
Date: Mon, 03 Dec 2007 11:25:14 -0500

I need to substitute a new icon for ProgressBar that is configured as a
Busy ProgressBar. There is a property to set an icon for a ProgressBar
that is indeterminate but no such property for one that is configured as
Busy. So what is the best way to change this? Build a custom woodstock
source with a different icon? Build a special theme?