Unfortunately, you can't use Conditional Formatting based on other
Worksheets or Workbooks. It has to be used on the same worksheet. With
that in mind, you may need to use a helper cell on the same sheet. For
example, in M1 use the following formula.

=COUNTIF(Sheet1!A1:A90,A2)

The use conditional formatting. Click drop-down and select "Formula Is".
Then enter the formula below:

=M10

HTH,
Paul

"Nolene" wrote in message
...
I have a list of codes on Sheet 2 (A1:A90). When I enter data into cell C1
on
Sheet 1, I want it to look at the codes on Sheet 2 and if the code I
entered
matches any of the ones in the list, then make the text in that cell blue
or
bold. I understand about naming the cell range, but can't figure out the
matching part.