Imports System.IO

Public Class MDIDemo
    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 MnuFile As System.Windows.Forms.MenuItem
    Friend WithEvents MnuWindows As System.Windows.Forms.MenuItem
    Friend WithEvents MnuOpen As System.Windows.Forms.MenuItem
    Friend WithEvents MnuExit As System.Windows.Forms.MenuItem
    Friend WithEvents OpenFileDialog As System.Windows.Forms.OpenFileDialog
    Friend WithEvents MnuWinH As System.Windows.Forms.MenuItem
    Friend WithEvents MnuWinV As System.Windows.Forms.MenuItem
    Friend WithEvents MnuWinC As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem
    Friend WithEvents MainMenu As System.Windows.Forms.MainMenu
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Me.MainMenu = New System.Windows.Forms.MainMenu(Me.components)
        Me.MnuFile = New System.Windows.Forms.MenuItem
        Me.MnuOpen = New System.Windows.Forms.MenuItem
        Me.MnuExit = New System.Windows.Forms.MenuItem
        Me.MnuWindows = New System.Windows.Forms.MenuItem
        Me.MnuWinH = New System.Windows.Forms.MenuItem
        Me.MnuWinV = New System.Windows.Forms.MenuItem
        Me.MnuWinC = New System.Windows.Forms.MenuItem
        Me.OpenFileDialog = New System.Windows.Forms.OpenFileDialog
        Me.MenuItem1 = New System.Windows.Forms.MenuItem
        Me.MenuItem2 = New System.Windows.Forms.MenuItem
        Me.SuspendLayout()
        '
        'MainMenu
        '
        Me.MainMenu.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MnuFile, Me.MnuWindows, Me.MenuItem1})
        '
        'MnuFile
        '
        Me.MnuFile.Index = 0
        Me.MnuFile.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MnuOpen, Me.MnuExit})
        Me.MnuFile.Text = "文件"
        '
        'MnuOpen
        '
        Me.MnuOpen.Index = 0
        Me.MnuOpen.Text = "打開"
        '
        'MnuExit
        '
        Me.MnuExit.Index = 1
        Me.MnuExit.Text = "退出"
        '
        'MnuWindows
        '
        Me.MnuWindows.Index = 1
        Me.MnuWindows.MdiList = True
        Me.MnuWindows.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MnuWinH, Me.MnuWinV, Me.MnuWinC})
        Me.MnuWindows.Text = "窗口"
        '
        'MnuWinH
        '
        Me.MnuWinH.Index = 0
        Me.MnuWinH.Text = "水平平鋪"
        '
        'MnuWinV
        '
        Me.MnuWinV.Index = 1
        Me.MnuWinV.Text = "垂直平鋪"
        '
        'MnuWinC
        '
        Me.MnuWinC.Index = 2
        Me.MnuWinC.Text = "層疊"
        '
        'OpenFileDialog
        '
        '
        'MenuItem1
        '
        Me.MenuItem1.Index = 2
        Me.MenuItem1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem2})
        Me.MenuItem1.Text = "幫助"
        '
        'MenuItem2
        '
        Me.MenuItem2.Index = 0
        Me.MenuItem2.Text = "關于"
        '
        'MDIDemo
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(552, 294)
        Me.IsMdiContainer = True
        Me.Menu = Me.MainMenu
        Me.Name = "MDIDemo"
        Me.Text = "MDIDemo"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub MnuOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MnuOpen.Click
        OpenFileDialog.Filter = "圖片 | *.jpg"
        OpenFileDialog.ShowDialog()
        ' Child.ShowDialog()

    End Sub

    Private Sub OpenFileDialog_FileOk(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog.FileOk
        Dim frmChild As New Child()
        frmChild.MdiParent = Me
        frmChild.PictureBox.Image = Image.FromFile(OpenFileDialog.FileName)
        frmChild.Show()
    End Sub

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

    Private Sub MnuWinH_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MnuWinH.Click
        Me.LayoutMdi(MdiLayout.TileHorizontal)
    End Sub

    Private Sub MnuWinV_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MnuWinV.Click
        Me.LayoutMdi(MdiLayout.TileVertical)
    End Sub

    Private Sub MnuWinC_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MnuWinC.Click
        Me.LayoutMdi(MdiLayout.Cascade)
    End Sub

    Private Sub MenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem2.Click
        Dim frmAbout As New Child()

        Dim dlgrsltAbout As DialogResult

        dlgrsltAbout = frmAbout.ShowDialog()

    End Sub
End Class