I really want to help you, but I am having a hard to understanding your question.  The table name would be whatever table to which you are mapping your business object (BO).  The database would be is not specified at the textbox level, but is part of your connection that is established in the AppMain.vb or program.cs files.  Each BO has a DataSourceKey which is then used to tie itself to the Database Connections setup in the SetDataSources method in your AppMain.vb or program.cs source files.  Again, I think that if you would take a look at some of the samples that many of these questions would be answered for you.