I can determine where the mouse is in a MouseUp event on a
chart (thanks to Greg and Jon for the helpful hints) but
converting that to chart points (not printing points --
1/72 in) and values is ludicrous.

I can estimate chart points (the chart X value) by using
the mouse position in printing points (1/72 in) and Left,
InsideWidth, the total number of X points on the charts,
and some silly math. However, if you float the mouse
pointer over a point on the graph, a Excel pop-up shows
the actual chart point and value. That's what I need!
Microsoft can do it; why can't I?

I suspect that if I could determine the index of the Point
object in the Points collection, I could then read the
values from the worksheet data. But how can I determine
that index? Is there another way?

I think my next post will have to be to a psychiatry group.

Steve