Compare three columns for duplicates

Hi Special K

Thanks but when I try to paste in the code I get an error

The first C is highlighted as if there is some problems there.

Im a neewbie to excel, so I need as much help as possible, thanks.

try to upload your sample workbook, click "Go Advanced" button and find pasperclip image button to attch your file

Thanks. I just needed to change to semicolon. It works now :-)