ASP.NET Tooltips Extender Control

Tooltips is always a good usability practice to display descripitve and meaningful message on UI, which provide guidance and extra information to users visually. However, I cannot find this kind of handy "control" in the latest version (40412) of the AJAX control toolkit. (Feature request?)

The traditional HTML "title" or "tooltips" tag of control cannot make the users (nor even developers) happy, so I searched and found this Tooltip Extender control today. It is nice and handy for developers, and it has HTML editing capabilities inside the tooltips panel.

I downloaded the source and re-compiled it against the latest version of AJAX control toolkit library, then add it to my current web project. So I can add tooltips information easily now. Nice! :)

For example,