Excel List Compare 1

Useful Excel macro will compare rows in 2 lists of data based on 1 to 3 columns in each list. Creates a new spreadsheet with matched rows from original 2 lists merged together on the same row and unmatched rows highlighted on separate rows.
As the 2 lists of data are merged into a one spreadsheet, the number of columns of the 2 lists together must not exceed the maximum number of columns Excel supports.
Tested on MS Office 97 - XP.