if MessageBox.Show("Los datos son correctos?", "Guardar Datos", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes
Me.ClientesBindingSource.EndEdit()
Me.ClientesTableAdapter.Update(Me.BdcontaDataSet1.clientes)
Me.ClientesBindingSource.AddNew()
Else
Me.ClientesBindingSource.CancelEdit()...