Public Class Latihan12
    Sub ulang(ByVal angka As Byte)
        If angka > 0 Then
            ListBox1.Items.Add("*" & angka & "*") '
        End If
    End Sub

    Sub ulang_cetak(ByVal angka As Byte)
        If angka > 0 Then
            ListBox1.Items.Add("*" & angka & "*")
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim X As Byte = 0
        Do
            Call ulang(X)
            X = X + 2
        Loop Until X > (TextBox1.Text)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim X As Byte = 0
        Do
            Call ulang_cetak(X)
            X = X + 3
        Loop Until X > (TextBox1.Text)
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ListBox1.Items.Clear()
        TextBox1.Text = ""
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Dim result As Integer = MsgBox("Apakah Anda Sudah Yakin Mau Keluar? ", MsgBoxStyle.Information + MsgBoxStyle.OkCancel, "Informasi")
        If result = DialogResult.OK Then
            Me.Close()
        Else
        End If
    End Sub
End Class