This reply may be a false trail for you, but just in case anything in these links might be of help to you:
Thank you, Dianne, for looking around on my behalf. I did see the first page (Dave Taylor) and have now looked at the second. The problem is that each requires me to be able to open the Workbook and view the Preferences.
I can't get that far. I get a small dialogue box that asks for the Password and, when the wrong one is entered, the box just goes away.
I'm beginning to think I'll need some heavy artillery. However, that seems to enter into some grey areas and Tacit has put enough of the Russian Mafia scare into me that I'm very, very wary.
ryck