Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles Timer1.Tick
        Dim elapsed As TimeSpan = Me.Stopwatch.Elapsed
        Hour_confirmation_quotationTextBox.Text = String.Format( _
          "{0:00}:{1:00}:{2:00}", elapsed.Hours, elapsed.Minutes, _
          elapsed.Seconds)
End Sub
 
Private Sub Button_StartStop_Click(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles Button_StartStop.Click
 
        If Button_StartStop.Text = "Start" Then
            Timer1.Start()
            Me.Stopwatch.Start()
            Button_StartStop.Text = "Stop"
            Exit Sub
        End If
 
        If Button_StartStop.Text = "Stop" Then
            Timer1.Stop()
            Me.Stopwatch.Stop()
            Button_StartStop.Text = "Start"
            Exit Sub
        End If
 
End Sub
 
Private Sub Button_Reset_Click(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles Button_Reset.Click
 
        Timer1.Stop()
        Me.Stopwatch.Reset()
        Hour_confirmation_quotationTextBox.Text = "00:00:00"
 
End Sub