I'm looking for a way to obtain the ACL for a specific registry key.  For example if I want the permissions of
  HKLM\SOFTWARE\Microsoft

I would get something like
  Administrators    Full Control
  Creator Owner     Special Permissions (List of special permissions here)
  Power Users       Read
                    Special Permissions (List of special permissions here)
  SYSTEM            Full Control
  Users             Read

In general terms what I want is something that would return a structure similar to the following for file ACLs

  Set wmiSecuritySettings = wmiServices.Get ("Win32_LogicalFileSecuritySetting.Path='" & fname & "'")
  intRetVal = wmiSecuritySettings.GetSecurityDescriptor(wmiSecurityDescriptor)

Any suggestions other than using the ADsSecurity.DLL (which is not shipped with WinXP).  I cannot install any SW on the box where this will be running.