Chris, something like this

Private Sub Workbook_Open()
MsgBox "workbook is open"
End Sub



To put in this macro, from your workbook right-click the workbook's icon and
pick View Code. This icon is to the left of the "File" menu this will open
the VBA editor, in the left hand window double click on thisworkbook, under
your workbook name, and paste the code in the window that opens on the right
hand side, press Alt and Q to close this window and go back to your
workbook, now this will run every time you open the workbook. If you are
using excel 2000 or newer you may have to change the macro security
settings to get the macro to run.
--
Paul B
Always backup your data before trying something new
Please post any response to the newsgroups so others can benefit from it
Feedback on answers is always appreciated!
Using Excel 2000 & 2003
** remove news from my email address to reply by email **


"Chris E." <Chris wrote in message
...
How do you show a message box when you open an excel file? I've done this
before I just can't remember how.

Thanks,
Chris