Thanks for the reply!
The problem is that, from the moment the editor.StartEdit is called, I don't receive any MouseLEftButtonDown events anymore. When the dragging is finished, I get the GeometryMoved action, I stop the editing, and then I get the 'MouseLeftButtonUp'.
Any thoughts on how to get something similar to the MouseLeftButtonDown event when the editor is already started?
Thanks,
Joris