C#運行時鼠標移動控件 - 調用Windows API（ReleaseCapture）

        [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 == 1)
            {
                ReleaseCapture();
                SendMessage(sender.Handle, 161, 2, 0);
                SendMessage(sender.Handle, 0x0202, 0, 0);
            }
            else
            {
                //添加雙擊或右擊代碼……
            }
        }

        private void button3_MouseDown(object sender, MouseEventArgs e)
        {
            MoveControl(sender as Control, e);
        }