There is a nice open-source (MIT license) tool, which can make taskbar customized/tweaked, but the main feature we like is that it can make taskbar transparent at any degree.
also has some other nice features.
Please integrate it within your application.
At this moment, I have to run 2 programs (7+ tweaker and that) 24 hrs in tray. If you integrate, i will only need to run your app.
Customer support service by UserEcho