Disabling PrintScreen

We need a way to prevent confidential information from being printed.
We have secured the database application itself by disabling all print
commands except the ones we want, but PrintScreen still works fine.

We cannot use any system-wide disbaling of that key, because it is
the only way that users can print off screens from the BPCS terminal
program. We actually have a program that prints off a page directly
when the Print Screen button is pressed, and people have become
accustomed to using it.

I have searched this topic extensively and found nothing. The only
thing I can think of is to make a data access page and use
standard browser security code, but that would require an extensive
rewrite of our application.

Does anyone know how to disable the PrintScreen key from within the
database application? Thanks.