Calling Forms4 User Exits from a Library?

Greetings Forms Experts,

Have you ever called a user exit from a library? The reason I ask is that is seems that user exits can only be passed the following variables:

[pg. G-6 "Oracle Forms Ref Manual, Volume 2"]
 

  block.item, parameter, system vars, global vars, host language vars

Whilst libraries CANNOT refer to any of the following:

[pg. 17-5 "Oracle Forms User Guide"]

  block.item, global, system vars, parameters

I gotta believe that someone has a library procedure that gets data passed to it from a form and in turn calls a user exit which processes this data. I can't seem to understand how to do this given the situation described. I'll bet the answer has to do with Name_In functions or some other obscure thing.

I'll be eternally grateful if you post an example, please!

I'm using Forms V4.0.11 and Oracle 7.0.15 all under HP-UX.

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