Private Sub buT1Save_Click(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles buT1Save.Click
        Try
            Me.Validate()
            Me.T1BindingSource.EndEdit()
            Me.T1TableAdapter.Update(Me.AMSDBDataSet.T1)
            MsgBox("Update T1 successful")
 
        Catch es As Exception
            MsgBox("Update failed")
        End Try
    End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles MyBase.Load
     Me.T2TableAdapter.Fill(Me.AMSDBDataSet.T2)
     Me.T1TableAdapter.Fill(Me.AMSDBDataSet.T1)
End Sub