BindToClickEventCommand.cs

public class BindToClickEventCommand : ICommand
    {
              private Action _handler;
  
              public ViewModelCommand(Control control)
              {
                     
                     // Get the control's Type
                     Type someTreeViewType = ((UIElement)control).GetType();
  
                     // Dig out the undocumented (yes, I know, it's risky) EventHandlerStore
                     // from the control's Type
                     PropertyInfo EventHandlersStoreType =
                                  someTreeViewType.GetProperty("EventHandlersStore",
                                  BindingFlags.Instance | BindingFlags.NonPublic);
  
                     // Get the actual "value" of the store, not just the reflected PropertyInfo
                     Object EventHandlersStore = EventHandlersStoreType.GetValue(control, null);
                     var mi= EventHandlersStore.GetType().GetMethod("GetRoutedEventHandlers", BindingFlags.Public | BindingFlags.Instance);
                     RoutedEventHandlerInfo[] res = (RoutedEventHandlerInfo[])mi.Invoke(EventHandlersStore, new object[] { CheckedTreeViewItem.CheckedEvent });
                     var parent = VisualTreeHelper.GetParent(control);
                     while (!(parent is Window))
                     {
                           parent = VisualTreeHelper.GetParent(parent);
                     }
  
  
                     _handler = () => {
                           res.First().Handler.Method.Invoke(parent, new object[] { control, new RoutedEventArgs() });
                     };
                     
              }
  
              #region ICommand Members
  
              public bool CanExecute(object parameter)
              {
                     return true;
              }
  
              public event EventHandler CanExecuteChanged;
  
              public void Execute(object parameter)
              {
                     _handler();
              }
  
              #endregion
       }