form1.vb

Source code for VB.NET book - Chapter 4

Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

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

    End Sub

    '窗体重写 dispose 以清理组件列表。
    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 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox2 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox3 As System.Windows.Forms.PictureBox
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    Friend WithEvents PictureBox4 As System.Windows.Forms.PictureBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.PictureBox2 = New System.Windows.Forms.PictureBox
        Me.PictureBox3 = New System.Windows.Forms.PictureBox
        Me.Timer1 = New System.Windows.Forms.Timer(Me.components)
        Me.PictureBox4 = New System.Windows.Forms.PictureBox
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.Image = CType(resources.GetObject("PictureBox1.Image"), System.Drawing.Image)
        Me.PictureBox1.Location = New System.Drawing.Point(96, 24)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(88, 72)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'PictureBox2
        '
        Me.PictureBox2.Image = CType(resources.GetObject("PictureBox2.Image"), System.Drawing.Image)
        Me.PictureBox2.Location = New System.Drawing.Point(24, 80)
        Me.PictureBox2.Name = "PictureBox2"
        Me.PictureBox2.Size = New System.Drawing.Size(72, 64)
        Me.PictureBox2.TabIndex = 1
        Me.PictureBox2.TabStop = False
        Me.PictureBox2.Visible = False
        '
        'PictureBox3
        '
        Me.PictureBox3.Image = CType(resources.GetObject("PictureBox3.Image"), System.Drawing.Image)
        Me.PictureBox3.Location = New System.Drawing.Point(200, 56)
        Me.PictureBox3.Name = "PictureBox3"
        Me.PictureBox3.Size = New System.Drawing.Size(72, 80)
        Me.PictureBox3.TabIndex = 2
        Me.PictureBox3.TabStop = False
        Me.PictureBox3.Visible = False
        '
        'Timer1
        '
        Me.Timer1.Interval = 200
        '
        'PictureBox4
        '
        Me.PictureBox4.Image = CType(resources.GetObject("PictureBox4.Image"), System.Drawing.Image)
        Me.PictureBox4.Location = New System.Drawing.Point(112, 144)
        Me.PictureBox4.Name = "PictureBox4"
        Me.PictureBox4.Size = New System.Drawing.Size(88, 64)
        Me.PictureBox4.TabIndex = 3
        Me.PictureBox4.TabStop = False
        Me.PictureBox4.Visible = False
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.PictureBox4)
        Me.Controls.Add(Me.PictureBox3)
        Me.Controls.Add(Me.PictureBox2)
        Me.Controls.Add(Me.PictureBox1)
        Me.Name = "Form1"
        Me.Text = "动画"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim n, ret As Integer
    Dim p As System.Drawing.Point
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Timer1.Enabled = True
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If p.X > Me.Location.X + 100 Then
            p.X = 0
        End If
        If p.Y > Me.Location.Y + 100 Then
            p.Y = 0
        End If
        p.X += 10
        p.Y += 10
        PictureBox1.Location = p
        PictureBox1.Image = PictureBox1.Image
        ret = n Mod 3
        Select Case ret
            Case 0
                PictureBox1.Image = PictureBox4.Image
            Case 1
                PictureBox1.Image = PictureBox2.Image
            Case 2
                PictureBox1.Image = PictureBox3.Image
        End Select
        n = n + 1
    End Sub
End Class