Capturing screen data from secondary program

If we have a menu option that allows a user to run a program and that 
program displays a code on the screen, is there a way for us to capture that 
code without having access to the actual program running?

here is the issue, one of our financial companies is Comdata which has 
provided us with a copy of their software which will generate an express 
code for a monetary advance which we will give to our drivers.  This express 
code (comcheck code) is displayed on the screen.  we need to capture this 
and write it to our payroll files so we can ensure that the driver has the 
amount deducted from their paycheck.

Since we do not have access to the underlying code, we cannot modify it to 
write out the information, and I am hoping that there is a way for us to 
capture it from the screen.

Suggestions, comments, or just tell me I'm nuts.


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