TreeList　选中节点时图标状态和背景色

this.treelArea.SelectImageList = imglCustom;
this.treelArea.OptionsView.ShowFocusedFrame;
this.treelArea.Appearance.FocusedCell.BackColor = System.Drawing.Color.LightSteelBlue;
this.treelArea.Appearance.FocusedCell.BackColor2 = System.Drawing.Color.SteelBlue;
this.treelArea.Appearance.FocusedCell.Options.UseBackColor = true;
this.treelArea.Appearance.FocusedCell.Options.UseTextOptions = true;
this.treelArea.Appearance.FocusedCell.TextOptions.WordWrap = DevExpress.Utils.WordWrap.Wrap;
private void treelArea_GetSelectImage(object sender, DevExpress.XtraTreeList.GetSelectImageEventArgs e)
{
e.NodeImageIndex = e.Node.Expanded ? 0 : e.Node.Nodes.Count > 0 ? 1 : 2;

if (e.FocusedNode)
{
e.NodeImageIndex += 3;
}
}