You can do this with the change event.

For an intro to events, see Chip Pearson's page
http://www.cpearson.com/excel/events.htm

--
Regards,
Tom Ogilvy

"Joe the NY Lawyer" <Joe the NY wrote in
message ...
I want to know how to "program" a cell (for example A1 on a spreadsheet)
so
that when you enter certain data into it (for example, the letter "A"),
certain data will automatically appear in other cells (for example the
number
"24" in cell B1 and the number "35" in cell C1.