compare two columns within a worksheet, then highlight duplicates
 

compare two columns within a worksheet, then highlight duplicates
 

Look at these two sites:
http://www.mvps.org/dmcritchie/excel/duplicates.htm

http://www.cpearson.com/excel/duplicat.htm#Replacing

best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
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