Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnHello.Click
        MessageBox.Show("Hello World!")
        MessageBox.Show("My name is Prof. Rosenthal")
        MessageBox.Show("I like ice cream.")
        MessageBox.Show("I live in the USA")

    End Sub

    Private Sub btnGoodbye_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGoodbye.Click
        MessageBox.Show("Goodbye")
    End Sub
End Class