using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace PaintDotNet.CustomControl { public class TreeViewEnhanced : TreeView { protected override void WndProc(ref Message m) { if (m.Msg == 0x203) { m.Result = IntPtr.Zero; } else base.WndProc(ref m); } } }