Retrieving userid from NT network using Delphi

Recently out network operating system was upgraded to NTS 4.0.  As a
result, a function written in Delphi 1.0 is no longer able to retrieve the
user's network ID.  My question is why did this stop working and what
changes will I need to make to resolve the problem?  Any info is
appreciated.  Thanks!

Posted via CNET