Would someone please give me an example of how to use the isalpha C
runtime function within an ILE pgm.  I have printed examples on how to
use C functions from the archives and referenced the Sorcerer's guide
but I am missing something.  The following is my (failing) code.  I am
attempting to determine if any alpha characters exist within a string.

H dftactgrp(*no) bnddir('QC2LE')
D num             s             10I 0
D str                s            10    inz('ABC')
D isalpha         pr                  ExtProc('isalpha')
D                                   10I 0 Value
C                   eval      num = isalpha(str)
C     num        dsply
C                   eval      *inlr = *on

Parts of the code was provided to midrange-l by Hans Boldt.  TIA.

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