Windows Service and Netware UserName

How can get a local windows service to detect who is logged in to Netware
Client on a workstation?

This code (Delphi) works as an application, but not as a service:

    if NWCallsInit(nil, nil) = 0 then
      if NWIsDSAuthenticated <> 0 then
        if NWDSCreateContextHandle(NovellContextHandle) = 0 then
          if NWDSWhoAmI(NovellContextHandle, @NovellBuffer) = 0 then
            NovellUserName := UpperCase(StrPas(@NovellBuffer));

Any help would be appreciated.

Thanks,

Kevin

Doubt you can since they are in different security contextes ...

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Peter