Hi,

What exactly do you mean by coordinates? Do you mean the scrollbar Position? Or do you mean the rectangle of the thumb element?

The Position property is pretty obviously, so I assume you probably mean the rect. How you get that depends a little on why you need it and what you intend to do with it.

Assuming the scrollbar is visible on the screen and has painted, you could do this using the UIElements.

ScrollThumbUIElement scrollThumbUIElement = this.ultraScrollBar1.UIElement.GetDescendant(typeof(ScrollThumbUIElement)) as ScrollThumbUIElement;
            if (scrollThumbUIElement != null)
            {
                Rectangle rect = scrollThumbUIElement.Rect;
                // Do something with the rect here.
            }