Is there a way to programatically tell part of a cell to be bold. For
example, I have a cell that says:

Your library book is OVERDUE. If you do not bring it back by MM/DD/YY, you
will be charged $$.$$.

I want the words OVERDUE, MM/DD/YY and $$.$$ bolded. What I am hoping for
is code to add before after the words for exampe <BOVERDUE</B.

Does such a thing exist in excel?

Thanks for any help.

Robs