Can I explicity show tooltip on Mouse Click event in WPF?

Question

I am showing a Tool Tip when Mouse hovers on Help image.

The xaml is given below:

Answer 1

EventManager.RegisterClassHandler(typeof(Window), Mouse.MouseDownEvent, 
                                  new MouseButtonEventHandler((o, args) => 
                                  { 
                                      if (_popup.IsOpen) 
                                          _popup.IsOpen = false; 
                                  }));