You can't do that. You might find my (free) RowLiner add-in useful for
highlighting row and column lines for easy identification of the
Active Cell. See
http://www.cpearson.com/excel/rowliner.htm for
information and download.
Cordially,
Chip Pearson
Microsoft Most Valuable Professional
Excel Product Group, 1998 - 2009
Pearson Software Consulting, LLC
www.cpearson.com
(email on web site)