I am currently running Excel 2003 (about to upgrade to 2010) in
Windows XP (Home 2002 sp3).

Here is what I would like to do: I have a folder of data files
(historical stock market data in CSV's). As I write/update these
files, I would like to modify the file attribute 'comments' to have
the value of the most recent 'Market Date' so that I can sort them by
'comments' when in Windows Explorer. I know how to retrieve the
attribute(s) into a spreadsheet (thank you John Walkenbach), but can
not find anything on here on how to update the 'comment' file
attribute. Any and all help is greatly appreciated.