I would like to give me your help please.. I have connected my sql db with vb and I m trying to make a UI. My question is that when I write code in order to create datatables and I fill them with the results of queries I've created, where do these datatables belong? I'm wondering if I have to define a new dataset or do they belong to the existed dataset which is created by the dataset configuration wizard??

Maybe this article can help you to understant the data table object in Visual Studio.

Hope this helps

Of course, you can also read from tables and write to tables using SqlDataReader and SqlCommand without ever dealing with DataTables and DataSets.