Epicor Customization - Hide Default Treeview Panel

Customization.epicor

using System.Reflection;

public class Script
{

    Infragistics.Win.UltraWinDock.UltraDockManager dock;
    
    public void InitializeCustomCode()
    {
        //....

        Object obj = typeof(Ice.UI.App.UD16Entry.UD16Form).InvokeMember("baseDockManager", BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic, null, UD16Form, null);
        dock =  (Infragistics.Win.UltraWinDock.UltraDockManager)obj;                  
        dock.DockAreas[0].Panes[0].Closed = true;
    }
    
    //....
    
}