BrightIdeasSoftware.VirtualObjectListView.DisableVirtualGroups C# (CSharp) Метод

        protected void DisableVirtualGroups()
        {
            IntPtr x;

            int err = NativeMethods.ClearGroups(this);
            //System.Diagnostics.Debug.WriteLine(err);

            const int LVM_ENABLEGROUPVIEW = 0x1000 + 157;
            x = NativeMethods.SendMessage(this.Handle, LVM_ENABLEGROUPVIEW, 0, 0);
            //System.Diagnostics.Debug.WriteLine(x);

            const int LVM_SETOWNERDATACALLBACK = 0x10BB;
            x = NativeMethods.SendMessage(this.Handle, LVM_SETOWNERDATACALLBACK, 0, 0);
            //System.Diagnostics.Debug.WriteLine(x);
        }