"So I download the latest Chrome browser beta the other day (v17) and I notice a neat effect on the tabs prior to applying my custom settings. A gradient centered on my mouse pointer passed across the tab as I moved it. It was very subtile but noticeable if you were paying attention. Naturally I wanted to reproduce the effect in Powerbuilder (I used v12.5 but you could do the same thing in 10 or 11)."