how to intimate other users about editing the record in shared excel workbook

hi all experts.
i have an excel database regarding about 1000 different schemes having the details of their initiation date, budget allocated , up to date expenditure, this month expenditure and many others too. this is a shared workbook and relevant officers enter their data in their relevant columns and rows. the file is shared. now i want that any changes done by mr. A, for eg. at record No. 09 could be intimated to Mr. B who is working at record No. 560. may be via msg box or any other source.