WPF Активация кнопки, по нажатию клавиши

<Window.InputBindings>
 
<KeyBinding Command="{StaticResource PressedButtonCommand}"  Key="q"/>
 
</Window.InputBindings>
 
<Button x:Name="MyButton" Command="{StaticResource PressedButtonCommand}">

<Window x:Class="WpfApplication1.CommandWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Custom Command Test" Height="300" Width="300">
 
    <Window.CommandBindings>
        <CommandBinding Command="Help" 
        CanExecute="HelpCanExecute"
        Executed="HelpExecuted" />
    </Window.CommandBindings>
 
    <Window.InputBindings>
        <KeyBinding Command="Help" Key="H" Modifiers="Ctrl"/>
        <MouseBinding Command="Help" MouseAction="LeftDoubleClick" />
    </Window.InputBindings>
 
    <StackPanel>
        <Button Command="Help" Content="Help Command Button" />
        <Button Content="My Command" x:Name="MyCommandButton" />
    </StackPanel>
</Window>

public partial class CommandWindow : Window
  {
    public static RoutedCommand MyCommand = new RoutedCommand();
 
    private bool _helpCanExecute = true;
 
    public CommandWindow()
    {
      InitializeComponent();
 
      CommandBinding cb = new CommandBinding(MyCommand,
          MyCommandExecute, MyCommandCanExecute);
      this.CommandBindings.Add(cb);
 
      MyCommandButton.Command = MyCommand;
 
      KeyGesture kg = new KeyGesture(Key.M, ModifierKeys.Control);
      InputBinding ib = new InputBinding(MyCommand, kg);
      this.InputBindings.Add(ib);
    }
 
    private void HelpCanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
      e.CanExecute = _helpCanExecute;
      e.Handled = true;
    }
 
    private void HelpExecuted(object sender, ExecutedRoutedEventArgs e)
    {
      MessageBox.Show("Hey, I'm some help.");
    }
 
    private void MyCommandCanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
      e.CanExecute = true;
    }
 
    private void MyCommandExecute(object sender, ExecutedRoutedEventArgs e)
    {
      MessageBox.Show("My Command!");
      _helpCanExecute = !_helpCanExecute;
    }
  }

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Custom Command Test" Height="300" Width="300">
 
    <Window.CommandBindings>
        <CommandBinding Command="Help" 
         Executed="PlaySoundExecuted" />
    </Window.CommandBindings>
 
    <Window.InputBindings>
        <KeyBinding Command="Help" Key="q"/>
    </Window.InputBindings>
 
    <StackPanel>
        <Button Command="Help" Content="Play Sound" />
        <MediaElement Height="120" HorizontalAlignment="Left" Margin="251,12,0,0" Name="mediaElement1" VerticalAlignment="Top" Width="47" MediaOpened="mediaElement1_MediaOpened" />
    </StackPanel>
</Window>

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
 
namespace WpfApplication1
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
    }
 
    private void PlaySoundCanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
      throw new NotImplementedException();
    }
 
    private void PlaySoundExecuted(object sender, ExecutedRoutedEventArgs e)
    {
      mediaElement1.Source = new Uri("CCRASH.wav", UriKind.Relative); 
    }
 
    private void mediaElement1_MediaOpened(object sender, RoutedEventArgs e)
    {
 
    }
  }
}