LRESULT RootWindowHostWin::OnMouseRange(UINT message,
                                        WPARAM w_param,
                                        LPARAM l_param) {
  MSG msg = { hwnd(), message, w_param, l_param, 0,
              { GET_X_LPARAM(l_param), GET_Y_LPARAM(l_param) } };
  MouseEvent event(msg);
  bool handled = false;
  if (!(event.flags() & ui::EF_IS_NON_CLIENT))
    handled = root_window_->DispatchMouseEvent(&event);
  SetMsgHandled(handled);
  return 0;
}

Unknown