Release DB Table from Memory

[nbCathy]

I know what the following lines do:

Dim conStr As String = "Provider=Microsoft.JET.OLEDB.4.0;data source=" & DBFileName
Dim sqlStr As String = "SELECT * FROM " & DBTableName
Dim conn As OleDbConnection = New OleDbConnection(conStr)
Dim da As OleDbDataAdapter = New OleDbDataAdapter(sqlStr, conn)
adapter's Fill method
Dim ds As DataSet = New DataSet
da.Fill(ds, DBTable)

But what is the following line do for me?

' Attach dataset's DefaultView to the datagrid control
DataGrid1.DataSource = ds.DefaultViewManager


How do I release the DBTable from memory? It seems as if I fill da. then I can da.dispose but that doesn't work.

Thanks