How can i hook windows messages in WPF？

How can i hook windows messages in WPF？

• Priyank_raval

  Get the source and set the hook after window initialization:

  public Window1()
  {
  InitializeComponent();
  this.SourceInitialized += new EventHandler(OnSourceInitialized);
  }

  void OnSourceInitialized(object sender, EventArgs e)
  {
  HwndSource source = (HwndSource)PresentationSource.FromVisual(this);
  source.AddHook(new HwndSourceHook(HandleMessages));
  }
  

  
  

• Jake Watkins

  Should have thought of that.
  Thanks of the support.
  
  

• Qkyrie

  I tried to implement the suggestion above.
  But it seems I cannot get it to run.
  Using the following code in my main window (Window1) I receive an exception while starting the application.
  
  public Window1() {
  InitializeComponent();
  //Adding hook
  HwndSource source = (HwndSource)PresentationSource.FromVisual(this);
  source.AddHook(new HwndSourceHook(HandleMessages));
  }
  
  private static IntPtr HandleMessages(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) {
  //Handle messages here
  return System.IntPtr.Zero;
  }
  
  The exception states:
  
  Window1 could not be instantiated. System.Windows.Markup.XamlParseException at
  "Window1.xaml", Zeile 1, Position 9.
  
  With my Xaml file being unmodified since the project was setup as vs 2005 wpf application.
  
  Xaml-file:
  <Window x:Class="WPFHandlingWin32Msg.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="WPFHandlingWin32Msg" Height="300" Width="300"
  >
  <Grid>
  
  </Grid>
  </Window>
  
  When removing the line:
  "source.AddHook(new HwndSourceHook(HandleMessages));"
  The exception does not occur.
  
  Any suggestions greatly appreciated.
  
  
  
  

• nrasinec

  There's a number of ways to do this. You should be able to use the same methods in a WPF application as in .Net 2.0 or Win32 applications (TCP/IP, Pipes, shared memory/memory mapped files, etc.).

  If you want communicate with messages, you need to look at the HwndSource class in the WPF documentation. HwndSource is what's "wrapped" around a WPF Window and allows it to function in the (still) "native" Windows OS.

  To get to the HwndSource from a WPF Window do something like this:

  HwndSource source = (HwndSource)PresentationSource.FromVisual(MyWindow);

  To add an event handler for received Windows messages do something like this:

  private IntPtr HandleMessages(IntPtr hwnd, int msg, IntPtr wParam,IntPtr lParam,ref bool handled)
  {
  // Your code here...
  }

  private void Setup()
  {
  source.AddHook(HandleMessages)
  }
  

  Hope this helps,

  Tor.

  
  

• Deedhun

  Do you want to set some data in clipboard if so you can use Clipboard.SetData
  
  
• How can i hook windows messages in WPF？