Chart mouse events

[Simonkara]

I have difficulties in using chart mouse events.First, I was suprised when I used the MouseDown event on the chart and nothing append when I clicked on my Area SerieAttributes.However, events are fired on my scatter SerieAttributes.The MouseDown event is not fired on the background, axes labels, legend, title...How am i supposed to get theses events ? Which elements of the chart can fire MouseDown events ?Then, I wanted to move my annotations. So I tried something different : I added a MouseDown and MouseUp event handlers on my TextBlock and a MouseMove event handler on the chart.Once I am in my MouseMove event handler how can I get the object I am trying to move and how can I set it to the new position ?I didn't find enougth information in the HitTestResults to retrieve my annotation.What if I wanted to do the same with a CustomGridLine ?