Scrolling
When working with a treeview it provides some useful properties and events to handle its visible area scrolling. Below are those you can use to control the treeview behavior while scrolling it.
HorzScrollPosChanged event#
When Flexible TreeView scrolls the content horizontally it raises HorzScrollPosChanged treeview event. The ScrollXShift property should be used to get the scroll shift value in pixels.
ScrollXShift#
ScrollXShift treeview property contains the treeview visible area horizontal shift in pixels. Its value varies between 0 (scroll bar is at the leftmost position) and unlimited.