Returning values with a procedure

[Booth Martin <booth@xxxxxxxxxxxx>]

Returning values with a procedure.

This is probably simple but I have never done it and can't find an 
example of how to do it.  I have an application that looks to me like it 
should use procedures that will return values.  Here is an example of 
what I'd like to do:

  c                eval    Duty = CanadianDuty(parm1: parm2: parm3)

and the procedure CanadianDuty would have 3 parameters as input and 
return the value of the duty.

I believe I can do that process, but I *know* I have no idea how to do 
the same thing where I need  to return 2 values, say "Duty" and 
"Tariff".  I am sure this solution would be wrong!  :)

  c                eval    Duty = CanadianDuty(parm1: parm2: parm3)
  c                eval    Tariff = CanadianDuty(parm1: parm2: parm3)

and this would also be wrong:

  c                eval    Duty:Tariff  = CanadianDuty(parm1: parm2: parm3)

Any pointers would be appreciated.  Thanks.