dim da as OledbDataAdapter = new OledbDataAdapter("select * from table1",....)
dim dt as DataTable = new DataTable()
da.Fill(dt);
...
dt.Rows(0).Delete()
dt.Rows.Add(new object(){"1","sdf","gw",...})
dt.Rows(1).Items(0) = "grewg";
....
dim cb as OleDbCommandBuilder = new System.Data.OleDb.OleDbCommandBuilder(da)
da.Update(dt)