private void Ctrl_pic_MouseWheel(object sender, MouseEventArgs e)
        {
            if (!is_start)
            {
                return;
            }

            if (context == System.IntPtr.Zero)
            {
                return;
            }

            ControlRemote.SendMouseEvent(context, ControlRemote.WM_MOUSEWHEEL, e.Delta);
        }
        private void Ctrl_pic_MouseDown(object sender, MouseEventArgs e)
        {
            if (!is_start)
            {
                return;
            }

            if (context == System.IntPtr.Zero)
            {
                return;
            }

            switch (e.Button)
            {
            case MouseButtons.Left:
                ControlRemote.SendMouseEvent(context, ControlRemote.WM_LBUTTONDOWN, 0);
                break;

            case MouseButtons.None:
                break;

            case MouseButtons.Right:
                ControlRemote.SendMouseEvent(context, ControlRemote.WM_RBUTTONDOWN, 0);
                break;

            case MouseButtons.Middle:
                ControlRemote.SendMouseEvent(context, ControlRemote.WM_MBUTTONDOWN, 0);
                break;

            case MouseButtons.XButton1:
                break;

            case MouseButtons.XButton2:
                break;

            default:
                break;
            }
        }