Is this possible and if so

["Douglas W. Palme" <dpalme@xxxxxxxxxxxxxxxxxxxxx>]

I was wondering if this is possible and if so, if someone would point me in 
the right direction.

I have a display file that a user uses to enter in motor vehicle citations, 
accidents, etc.  There are three fields: a date of the violation field, the 
state in which the violation occured and a violation code field which 
accepts a numeric value between 01 and 99.  what I would like to do is have 
the program display the corresponding description as soon as the user enters 
the code value, IE: they enter 01 and exit the field and a description field 
on the display file shows the description for that code.

Suggestions? Or is this something that is better handled via help files?  
The problem I see with help files is constantly making changes as we enter 
new code violation codes or delete ones no longer needed.

Suggestions?

Douglas