I'm trying to locate the correct, official, gwadmin devel bundle that
defines the C/C++ access methods, i.e. get/put definitions, for PrefEMailID
for the User object.

The gwadmin "kit" currently posted on Novell's web site, dated 2006.02.22
or 2006.03.01 depending on if you believe the file name of the tar ball or
the date posted on the web, does not have the definitions therein.

Yet the documentation found on the same page does mention the new value.

Here's the url I'm using: