how to fix position of a windows form

//protected override void WndProc(ref Message message)
        {
            const int WM_SYSCOMMAND = 0x0112;
            const int SC_MOVE = 0xF010;
            switch (message.Msg)
            {
                case WM_SYSCOMMAND:
                    int command = message.WParam.ToInt32() & 0xfff0;
                    if (command == SC_MOVE)
                        return;
                    break;
            }
            base.WndProc(ref message);
        }