当应用程序未处于焦点时获取控制器输入

Question

我正在寻找一个程序，当我按下我的xbox控制器上的按钮时，即使程序没有聚焦，也会启动一个wpf窗口。

以下是我目前正在使用的代码：

private readonly List<Joystick> joysticks = new List<Joystick>();
    private readonly DirectInput directInput = new DirectInput();
    private readonly Timer timer = new Timer(1000);

    public ControlManagement()
    {
        var devices = this.directInput.GetDevices(DeviceClass.GameController, DeviceEnumerationFlags.AttachedOnly);

        foreach (var device in devices)
        {
            var joystick = new Joystick(this.directInput, device.InstanceGuid);
            joystick.Acquire();

            this.joysticks.Add(joystick);
        }

        timer.Enabled = true;
        timer.Elapsed += TimerOnElapsed;
        timer.Start();
    }

    private void TimerOnElapsed(object sender, ElapsedEventArgs e)
    {
        foreach (var joystick in this.joysticks)
        {
            var state = joystick.GetCurrentState();
            var buttons = state.GetButtons();
            if (buttons.Any(b => b))
            {
                MessageBox.Show("You pressed a button!");
                busy = false;
                return;
            }
        }
    }