Assign Error message to Standard toolbar icon
 

I am running Office 2003 and I want to assign a error message to the SAVE
icon on the StandardToolbar to disable the standard save function to get the
user to use another save button I have set up on the Sheet. I know it can be
done because I have it on a spreadsheet someone elsse set up but I cannot
find where they set it up.

any help would be most apprciated.