Generating Event for a shape created under Listbox selection changed event

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C#

WPF

Hi all,

I have a list box and some images in the listbox.
Now i display the image on a canvas and draw a shape like rectangle with mouse down , mouse move and mouse up events.and want to copy the rectangle on all the images, so i have taken a list with the center point of the rectangle and for each image i have drawn a shape with the centre point of the first rectangle.
now when i click on each image in the listbox. the old rectangle will be hidden and new rectangle is created with the centre point on that image.
well up to this is OK.

Now i want to generate mouse click event on the shape(these are dynamically created) on every image

Listbox selection changed:

Rectangle rect1=new Rectangle {
                                    Stroke=Brushes .Black ,
                                    StrokeThickness=1};
rect1.Height=Myrect.Height;
rect1.Width=Myrect.Width;
     Canvas.SetLeft(rect1,Hlist.Position.X-rect1.Width/2);
     Canvas.SetTop(rect1,Hlist.Position.Y-rect1.Height/2);
Mycanvas.Children.Add(rect1);
rect1.MouseRightButtonDown+=new MouseButtonEventHandler(Rect1_Click);// this event is not raising

Every time when listbox image selection is changed one shape is created. now where should i write the mouse click event for the shape created.

Thanks,