After getting a request for a sample of my component in use, I made this very simple demo:
http://aspalliance.com/aylar/highlight/tester.aspx
If you want the source for this, it can be found here:
http://aspalliance.com/aylar/highlight/tester.aspx.txt
(Note: most browsers tries to parse this as actual xml, so do a 'View Source' or similar to get the actual code.)