extern static int NetUserEnum([MarshalAs(UnmanagedType.LPWStr)]

    Public Declare Function NetUserEnum Lib "Netapi32.dll" ( _

    NetUserEnum(server, 0, 2, bufPtr, -1, EntriesRead, TotalEntries, [Resume])

    NetUserEnum(server, 0, FILTER_NORMAL_ACCOUNT, out bufPtr, MAX_PREFERRED_LENGTH, out EntriesRead, out TotalEntries, out Resume);

            NetUserEnum(sServername,1, 2, out bufPtr, -1, out EntriesRead, out TotalEntries, out Resume);