How can I retrieve users with Administrators privilege?

[SherTeks]

How can I programatically retrieve the list of users available in the 'Administrators' group
which is accessible (in XP) through :

Right click 'My Computer' -> Manage -> Computer Management (Local) -> System Tools ->
Local Users and Groups -> Groups -> Administrators (double click).

Using NetUserEnum(), I am able to retrieve users who are also Administrators but entries like
XYZDomain\XYZAdminUser under the 'Administrators' group couldn't be retrieved.

How could I specifically retrieve entries like 'XYZDomain\XYZAdminUser'.

Thanks in Advance.

[Igor Vartanov]

NetLocalGroupGetMembers for local Administrators group
NetGroupGetUsers for domain Administrators group

BTW, what is the ultimate task for this enumeration?