WPF equivalent of Application.AddMessageFilter (Windows Forms)
In WPF, you can use ComponentDispatcher.ThreadFilterMessage event.
ComponentDispatcher.ThreadFilterMessage += ComponentDispatcher_ThreadFilterMessage;private void ComponentDispatcher_ThreadFilterMessage(ref MSG msg, ref bool handled){ if (msg.message == 513)//MOUSE_LEFTBUTTON_DOWN { //todo }}
If you want to monitor a window message, you can use HwndSource.AddHook method. The following example shows how to use Hwnd.AddHook method. If you want to monitor a application scope message, you can try to use ComponentDispatcher class.
private void Button_Click(object sender, RoutedEventArgs e){ Window wnd = new Window(); wnd.Loaded += delegate { HwndSource source = (HwndSource)PresentationSource.FromDependencyObject(wnd); source.AddHook(WindowProc); }; wnd.Show();}private static IntPtr WindowProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled){}