Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗體設計器生成的代碼 "

    Public Sub New()
        MyBase.New()

        '該調用是 Windows 窗體設計器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 調用之后添加任何初始化

    End Sub

    '窗體重寫處置以清理組件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗體設計器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下過程是 Windows 窗體設計器所必需的
    '可以使用 Windows 窗體設計器修改此過程。
    '不要使用代碼編輯器修改它。
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox2 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox3 As System.Windows.Forms.PictureBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Button2 = New System.Windows.Forms.Button()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox()
        Me.PictureBox2 = New System.Windows.Forms.PictureBox()
        Me.PictureBox3 = New System.Windows.Forms.PictureBox()
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(56, 88)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "切換信號燈"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(176, 88)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "結束程序"
        '
        'PictureBox1
        '
        Me.PictureBox1.Image = CType(resources.GetObject("PictureBox1.Image"), System.Drawing.Bitmap)
        Me.PictureBox1.Location = New System.Drawing.Point(80, 40)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(16, 16)
        Me.PictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.PictureBox1.TabIndex = 2
        Me.PictureBox1.TabStop = False
        '
        'PictureBox2
        '
        Me.PictureBox2.Image = CType(resources.GetObject("PictureBox2.Image"), System.Drawing.Bitmap)
        Me.PictureBox2.Location = New System.Drawing.Point(144, 40)
        Me.PictureBox2.Name = "PictureBox2"
        Me.PictureBox2.Size = New System.Drawing.Size(16, 16)
        Me.PictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.PictureBox2.TabIndex = 3
        Me.PictureBox2.TabStop = False
        '
        'PictureBox3
        '
        Me.PictureBox3.Image = CType(resources.GetObject("PictureBox3.Image"), System.Drawing.Bitmap)
        Me.PictureBox3.Location = New System.Drawing.Point(208, 40)
        Me.PictureBox3.Name = "PictureBox3"
        Me.PictureBox3.Size = New System.Drawing.Size(16, 16)
        Me.PictureBox3.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.PictureBox3.TabIndex = 4
        Me.PictureBox3.TabStop = False
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(320, 133)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.PictureBox3, Me.PictureBox2, Me.PictureBox1, Me.Button2, Me.Button1})
        Me.Name = "Form1"
        Me.Text = "信號燈"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        PictureBox2.Visible = False
        PictureBox3.Visible = False
    End Sub

    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If PictureBox1.Visible = True Then
            PictureBox1.Visible = False
            PictureBox2.Visible = True
        ElseIf PictureBox2.Visible = True Then
            PictureBox2.Visible = False
            PictureBox3.Visible = True
        Else
            PictureBox3.Visible = False
            PictureBox1.Visible = True
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        End
    End Sub
End Class