database update frm datagrid

hello all

 following is my sample code
 
OleDbConnection conn = new OleDbConnection ("Provider= Microsoft.Jet.OlEDB.4.0;
Data Source = c:\\book.mdb;");

OleDbCommand  command = new OleDbCommand ("SELECT * FROM addressbook",conn);

OleDbDataAdapter adapter = new OleDbDataAdapter(command);

DataSet ds = new DataSet();

adapter.fill(ds,"addressbook");

dgrid.SetDataBinding ( dset, “addressbook” );


now its displaying the entire table (addressbook ) my datagrid (dgrid)

if i want to update the tablenow -  how to do ?

pls help