Editor1_IndicatorMarginClick

IndicatorMarginClick responds to a left mouse button click and returns the corresponding line number - good.
However, I need to open a context menu when the user clicks a margin image.
Is there a way to check mouse position for which margin image the mouse is over and which line this image corresponds to?
Also, I would like to "drag" margin images to let the user shift the current execution line while in debug mode. Is there an easy way to do this?

Thanks for any suggestion...!