Make Borderless Form Movable

protected override void WndProc(ref Message m)
        {
            switch(m.Msg)
            {
                case 0x84:
                    base.WndProc(ref m);
                    if ((int)m.Result == 0x1)
                        m.Result = (IntPtr)0x2;
                    return;
            }
            base.WndProc(ref m);
        }