[dba-SQLServer] ADOX help

It looks like the SQL Server Users and Groups collections aren't supported
for ADOX -- anyone know for sure -- I may have misunderstood what I read. 

Susan H. 

Anybody here familiar with using ADOX and SQL Server and have some free time
today? I need help completing an article -- all I would need is a few
snippets of generic code -- but I need them today. Specifically, I'd like an
example of appending a column to an existing table or appending a new table
to a database. Also, I'd like a security example -- not as specific on it --
could be as simple as appending a new user to an existing group.