TableLayoutPanel SLOW 에서 FAST 하게 하는 코드

    public static class NativeMethods

    {

        public static int WM_SETREDRAW = 0x000B; //uint WM_SETREDRAW

        public static int WS_EX_COMPOSITED = 0x02000000;

        

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam); //UInt32 Msg

    }

class DoubleBufferTableLayoutPanel : TableLayoutPanel

    {

        public DoubleBufferTableLayoutPanel()

        {

            SetStyle(ControlStyles.DoubleBuffer, true);

        }

        protected override void OnCreateControl()

        {

            base.OnCreateControl();

            this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.CacheText, true);

        }

        protected override CreateParams CreateParams

        {

            get

            {

                CreateParams cp = base.CreateParams;

                cp.ExStyle |= NativeMethods.WS_EX_COMPOSITED;

                return cp;

            }

        }

        public void BeginUpdate()

        {

            NativeMethods.SendMessage(this.Handle, NativeMethods.WM_SETREDRAW, IntPtr.Zero, IntPtr.Zero);

        }

        public void EndUpdate()

        {

            NativeMethods.SendMessage(this.Handle, NativeMethods.WM_SETREDRAW, new IntPtr(1), IntPtr.Zero);

            Parent.Invalidate(true);

        }

    }

DoubleBufferTableLayoutPanel  이것을 쓴다.