Disable using Esc in PowerPointViewer 97

I want to ensure that end-users can not disrupt an automatic timed slide show. The slide show starts from an ole embedded object in Access97. While it is running a number of things are happening, including the running of a KRONOS Script file that they are not supposed to see. How do I FORCE them to sit back and watch the entire show.

(Maybe even display an error message if they try to click, tab, page-down, esc, etc.)

The Access program will be on a NT PC with the bare minimums and PowerPointViewer and Access 97. The Access program will start in start up the main screen is maximized & modal; I have keypress events in place that will keep them from exploring.