form.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Public Class Form
    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

    '窗体重写处置以清理组件列表。
    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 MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents MenuItem3 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem As System.Windows.Forms.MenuItem
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents menu_exit As System.Windows.Forms.MenuItem
    Friend WithEvents menu_select As System.Windows.Forms.MenuItem
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form))
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.MenuItem = New System.Windows.Forms.MenuItem
        Me.menu_select = New System.Windows.Forms.MenuItem
        Me.MenuItem3 = New System.Windows.Forms.MenuItem
        Me.menu_exit = New System.Windows.Forms.MenuItem
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.SuspendLayout()
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem})
        '
        'MenuItem
        '
        Me.MenuItem.Index = 0
        Me.MenuItem.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.menu_select, Me.MenuItem3, Me.menu_exit})
        Me.MenuItem.Text = "操作"
        '
        'menu_select
        '
        Me.menu_select.Index = 0
        Me.menu_select.Text = "输入透明度"
        '
        'MenuItem3
        '
        Me.MenuItem3.Index = 1
        Me.MenuItem3.Text = "-"
        '
        'menu_exit
        '
        Me.menu_exit.Index = 2
        Me.menu_exit.Text = "退出"
        '
        'PictureBox1
        '
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.PictureBox1.Image = CType(resources.GetObject("PictureBox1.Image"), System.Drawing.Image)
        Me.PictureBox1.Location = New System.Drawing.Point(8, 8)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(280, 220)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'Form
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(294, 235)
        Me.Controls.Add(Me.PictureBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Menu = Me.MainMenu1
        Me.MinimizeBox = False
        Me.Name = "Form"
        Me.Opacity = 0.48
        Me.Text = "透明窗体"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub menu_exit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles menu_exit.Click
        Close()
        '结束程序
    End Sub
    Private Sub Menu_select_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles menu_select.Click
        Dim num As Double
        num = 1 - Me.Opacity
        '变量赋初值以防出现错误
        Try
            num = InputBox("请输入透明度(0.00~1.00)：", "透明度", 0.48, , )
        Catch
        Finally
            Beep()
        End Try
        '结构化异常处理
        If num > 1 Then
            num = 1
        End If
        If num < 0 Then
            num = 0
        End If
        Me.Opacity = 1 - num
        '根据输入的值设置窗口的透明度
    End Sub

    Private Sub formstaytop_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
End Class