My listing is out running my ability.

I was in a xlsx workbook and followed the instructions in this link.
Highlight active cell or selection with VBA code

When I tried to save the book, I got a message telling me I could only save it as a macro enabled book so I saved it as a xlsm. When I opened that book. the macro worked fine. My problem is, when I hit ALT>11' an empty code window show up. When I hit CTRL>R, the project explorer will show up. hitting anything in it doesn't bring up anything in the code window.