This setting is turned on, bu i don't get the full row select ( with the expansion nodes ) and the selected node color. Can this be caused by override settings? Do we must set this to default values ?

Thanks.

I am not sure what you mean by "the selected node color.", but to get full row select, try this:

            this.ultraTree1.DisplayStyle = Infragistics.Win.UltraWinTree.UltraTreeDisplayStyle.WindowsVista;
            this.ultraTree1.FullRowSelect = true;
            this.ultraTree1.ShowRootLines = false;
            this.ultraTree1.ShowLines = false;

Thanks, that worked for me! But its not possible to show expansion indicators with full row select? Because i dont see the expansion indicators.

That is correct. You cannot show expansion indicators on the root level when using FullRowSelect. This is consistent with how the inbox tree control works.