Hello,
here's a work that may be useful to someone else. I played starting from the work of 'DrawProgress' custom control, reviewed and corrected to make a scrollbar (with use of gradient).
This library is available in two versions: dll or static to integrate it directly into the executable. This archive contains all sources and a demo (using staticlib).
This version is intended to be used with RadAsm 2.x (dll added in resource editor) and free for use.
(http://img405.imageshack.us/img405/1452/sanstitre1tf.jpg)
Whoa, very efficient :U