Public Class Tutorial_1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAddNow.Click
        MsgBox("Now Adding numbers.....")
        txtTotalSum.Text = Val(txtFirstNumber.Text) + Val(txtSecondNumber.Text)
    Public Sub ExitApplication()
        If MsgBox("Do you want to exit?", MsgBoxStyle.Exclamation, _
     "Tutorial_1") = MsgBoxResult.Yes Then
            Application.Exit()
        End If
    End Sub