/// <summary>
 /// Finds a DependencyObject in the layout of the application
 /// </summary>
 /// <param name="objectName">The name of the object</param>
 /// <returns>The object, or null if not found</returns>
 public DependencyObject FindObjectInLayout(string objectName)
 {
     checkApplicationContext();
     return(_appHost.FindObjectInLayout(objectName));
 }