form1.vb

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Public Class Form1

    Private _lab1 As Integer = 20
    Private _lab2 As Integer = 14
    Private _lab3 As Integer = 42
    Property lab1() As Integer
        Get
            Return _lab1
        End Get
        Set(ByVal value As Integer)
            If value >= 0 And value < 24 Then
                _lab1 = value
            End If
        End Set
    End Property
    Property lab2() As Integer
        Get
            Return _lab2
        End Get
        Set(ByVal value As Integer)
            If value >= 0 And value < 60 Then
                _lab2 = value
            End If
        End Set
    End Property
    Property lab3() As Integer
        Get
            Return _lab3
        End Get
        Set(ByVal value As Integer)
            If value >= 0 And value < 60 Then
                _lab3 = value
            End If
        End Set
    End Property




    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Label1.Text = lab1
        Label2.Text = lab2
        Label3.Text = lab3
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        lab1 = lab1 + 1
        Label1.Text = lab1

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        lab1 = lab1 - 1
        Label1.Text = lab1

    End Sub
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        lab2 = lab2 + 1
        Label2.Text = lab2
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        lab2 = lab2 - 1
        Label2.Text = lab2
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        lab3 = lab3 + 1
        Label3.Text = lab3
    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        lab3 = lab3 - 1
        Label3.Text = lab3
    End Sub

    Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
        Me.Close()
    End Sub

    Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click
        Me.Close()
    End Sub

    Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click

    End Sub
End Class