当程序未聚焦时检测游戏手柄输入

Question

我想知道当wpf不集中时如何从游戏手柄上获得输入。当专注时，它会起作用。 我正在创建一个程序，可以模拟Xbox控制器上的键盘输入和鼠标移动。我可以通过按箭头键（下面的代码）来移动鼠标。当我专注于该计划时，没有。 （稍后将更改为游戏手柄轴的移动。）

import {Component} from '@angular/core';
import {NgbDate, NgbCalendar} from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'ngbd-datepicker-range',
  templateUrl: './datepicker-range.html',
  styles: [``]
})
export class NgbdDatepickerRange {

  hoveredDate: NgbDate;

  fromDate: NgbDate;
  toDate: NgbDate;

  constructor(calendar: NgbCalendar) {
    this.fromDate = calendar.getToday();
    this.toDate = calendar.getNext(calendar.getToday(), 'd', 10);
  }

  onDateSelection(date: NgbDate) {
    if (!this.fromDate && !this.toDate) {
      this.fromDate = date;
    } else if (this.fromDate && !this.toDate && date.after(this.fromDate)) {
      this.toDate = date;
    } else {
      this.toDate = null;
      this.fromDate = date;
    }
  }

  isHovered = (date: NgbDate) => this.fromDate && !this.toDate && this.hoveredDate && date.after(this.fromDate) && date.before(this.hoveredDate);
  isInside = (date: NgbDate) => date.after(this.fromDate) && date.before(this.toDate);
  isRange = (date: NgbDate) => date.equals(this.fromDate) || date.equals(this.toDate) || this.isInside(date) || this.isHovered(date)
}

我的控制器管理器中的代码段

 private void Init()
    {
        Thread th = new Thread(Update);
        th.SetApartmentState(ApartmentState.STA);
        th.Start();
    }

    [DllImport("User32.dll")]
    private static extern bool SetCursorPos(int X, int Y);
    public void SetPosition(int a, int b)
    {
        SetCursorPos(a, b);
    }

    public System.Drawing.Point GetMousePosition()
    {
        System.Drawing.Point point = System.Windows.Forms.Control.MousePosition; 
        return new System.Drawing.Point(point.X, point.Y);
    }


    void Update()
    {
        while (isRunning)
        {

            Thread.Sleep(40);

            controllerManager.UpdateInput();

            if ((Keyboard.GetKeyStates(Key.Up) & KeyStates.Down) > 0)
                SetPosition(GetMousePosition().X, GetMousePosition().Y - speed);

            if ((Keyboard.GetKeyStates(Key.Down) & KeyStates.Down) > 0)
                SetPosition(GetMousePosition().X, GetMousePosition().Y + speed);

            if ((Keyboard.GetKeyStates(Key.Right) & KeyStates.Down) > 0)
                SetPosition(GetMousePosition().X + speed, GetMousePosition().Y);

            if ((Keyboard.GetKeyStates(Key.Left) & KeyStates.Down) > 0)
                SetPosition(GetMousePosition().X - speed, GetMousePosition().Y);

        }
    }

现在，当我没有聚焦时，我从Controller.GetCurrentReading（）中什么也没得到。当程序在后台运行时，如果我没有焦点，如何获取输入。