[System.Runtime.InteropServices.DllImport("user32.dll")]

        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

        [System.Runtime.InteropServices.DllImport("user32.dll")]

        public static extern bool ReleaseCapture();

        private void MoveControl(Control sender, MouseEventArgs e)

        {

            if (e.Button == MouseButtons.Left && e.Clicks == )

            {

                ReleaseCapture();

                SendMessage(sender.Handle, , , );

                SendMessage(sender.Handle, 0x0202, , );

            }

            else

            {

                //添加双击或右击代码……

            }

        }

        private void button3_MouseDown(object sender, MouseEventArgs e)

        {

            MoveControl(sender as Control, e);

        }