Help sais: Display cell contents in a shape or text box
Click the AutoShape or text box you want to link.
In the formula bar, type an equal sign (=).
Click the worksheet cell that contains the data or text you want to link to.
Press ENTER.
Note You cannot use this procedure in a freeform, scribble, line,
- but this is what I want! I want to process the line data.
I have a coarse set of x,y data that look nice when I get a shape between
the point, not just straight lines between points. How can I get/dump an
improved/ more dense set of coordinates positioned at the smooth shape?

This Q is for a preliminary solution (my set of x,y data came from a CAD
program), my real problem is that I have the perfect shape in AutoCad, but I
don't know how to dump out coordinates for that line either.