Determine Grid Cell for Mouse Click

All:

Given a WPF Grid... I'd like to determine the cell (row, column
intersection) that the mouse was clicked in.

1. What event is best to handle (just want a simple Click event)?
2. I certainly can get a click event, determine the mouse location,
determine the grid size and do the calculations myself, but I'm
guessing there's a direct (easier) way to get this info...?

Thanks,
John