I have a document that requires the conditional formating of several
hundred cells which are spreadout across the document. I would like to
know if the is a function or a method that I can use to assign a
general function to all of these cells at the same time without having
to modify the argument of this function for each of the cells.

Example: I want to change the font to green in all these afected cells
if there is an error in that specific cell. So I would be doing a
Conditional Formating using the "Formula Is" =ISERR(C15) where C15 is
just one of these cells.

I want to replace C15 (the cell reference) by some expression that
returns C15 when that "current cell" is executing the =ISERR() formula.
This way, I can apply the conditional formatting to all the affected
cells at the same time without having to change the cell address for
any of them individually!

Can this be done? How?

Thanks.