WPF: Change input language as en-US for bar-code scanner

1. ASUS X450J with Windows 10 Education x64 2. Add reference WindowsInput.DLL 2. Xaml 3. CS public MainWindow() { InitializeComponent(); //----將中文轉為英文輸入模式 文字方塊.KeyDown += 文字方塊_KeyDown; timer1.Interval = new TimeSpan(0, 0, 5); timer1.Tick += Timer1_Tick; timer1.Start(); /* Fail to change the input language in constructor method InputSimulator im = new InputSimulator(); this.Title = "開始掃描學生作業："; 文字方塊.Focus(); im.Keyboard.ModifiedKeyStroke(VirtualKeyCode.CONTROL, VirtualKeyCode.SPACE); // Change the default zh-TW to en-US */ } 4. private void Timer1_Tick(object sender, EventArgs e) { timer1.Stop(); InputSimulator im = new InputSimulator(); this.Title = "開始掃描學生作業："; 文字方塊.Focus(); im.Keyboard.ModifiedKeyStroke(VirtualKeyCode.CONTROL, VirtualKeyCode.SPACE); }