Thanks for the responses.
Maybe it is possible via Themes. Use these details:
Is there some example of using TThemedScrollBar ?. I can't find anything.
However, I still think you should rather use normal scrollbars.
I had a bad experience using Normal Controls with drawing on Canvas, with VB. I can remember this obstacles:
* They are slow for drawing. I need to refresh several times all the screen.
* They don't support zoom (FAIK).
* They are asociated with a control container not with any object.
* They draw always in front of the Canvas. It's not easy to draw over a control, hiding the control partially.
In fact I need buttons, checkbox and scrollbar for using on canvas. Probably I will have to write a little widget library for my App.