I realize there is no mouseover event in XL. However, I have built a
flowchart in XL and added OnAction events to the shapes. Therefore whenever
my mouse is over one of the flowchart shapes, it's changes into the hand
pointer. Is there someway to trigger a type of mouseover event from this?

What I ultimately want is whenever the mouse is over a shape, show a popup
message or balloon that displays a magnified view of the shape's caption or
something along those lines.

If any of this is possible I would really appreciate some guideance.