On Not in List

[bw]

I have this statement which inserts a new value into the table zContactTitles.
CurrentDb.Execute "INSERT INTO zContactTitles(Title) VALUES( """ & NewData & "");"

But suppose the values I'm using in my ComboBox is a list, and NOT a table? How (if it is
possible), do I insert new values into the list?

Thanks,
Bernie