I am using Win2000 and Excel 2000. I put a workbook onto a company-wide
server, and I'm afraid users are going to screw it up so another user opens
a file of garbage. The users are going to have to be able to filter and
hide columns and rows.

I can right-click on the file and set its property to Read-Only, so no
changes get saved when the file closes. But I'm concerned that someone will
simply turn it off. Is there any way to code a BeforeOpen action that will
set this property to Read-Only, regardless of how it was checked/unchecked
when the user opened it?

Ed