changing font type

[Lorena Leishman]

Hi everyone,
I have this acroform with let's say 100 fields. I want to change the font type 
of only one of these fields and leave the rest alone. I know the field name. Is 
there some reliable example code you know of that might performed this task?
I have tried different examples I found online with no success. Any help will 
be appreciated. 
Thanks!
Lorena