Public Class Form1
    Inherits System.Windows.Forms.Form
    Dim SelectFile As String
#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 dispose 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 OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'OpenFileDialog1
        '
        Me.OpenFileDialog1.FileName = "schedlgu.txt"
        Me.OpenFileDialog1.FilterIndex = 3
        Me.OpenFileDialog1.InitialDirectory = "c:\winnt"
        Me.OpenFileDialog1.ReadOnlyChecked = True
        Me.OpenFileDialog1.Title = "打開一個文件"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(16, 24)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "Button1"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(112, 24)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "Button2"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(208, 24)
        Me.Button3.Name = "Button3"
        Me.Button3.TabIndex = 2
        Me.Button3.Text = "Button3"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region


    ' Private Sub OpenFileDialog1_FileOk(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
    '    OpenFileDialog1.Title = "打開一個文件"
    '   OpenFileDialog1.InitialDirectory = "c:\winnt"
    '  OpenFileDialog1.FileName = "schedlgu.txt"
    ' OpenFileDialog1.ReadOnlyChecked = True
    ' OpenFileDialog1.Filter = "all files|*.*|(*.exe)|*.exe|(*.txt)|*.txt"
    'OpenFileDialog1.FilterIndex = 3
    'End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.Text = "通過打開文件對話框打開文件"
        Button1.Text = "選擇文件"
        Button2.Text = "執(zhí)行文件"
        Button3.Text = "退    出"
    End Sub
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim ret As Short
        OpenFileDialog1.FileName = ""
        OpenFileDialog1.ShowReadOnly = True
        OpenFileDialog1.ReadOnlyChecked = True
        OpenFileDialog1.InitialDirectory = "c:\"
        OpenFileDialog1.Filter = "All Files |*.*|(*.TXT)|*.TXT"
        OpenFileDialog1.FilterIndex = 2
        OpenFileDialog1.Title = "打開一個文件"
        OpenFileDialog1.ShowDialog()
        SelectFile = OpenFileDialog1.FileName
        If SelectFile = "" Then
            ret = MsgBox("沒有選擇文件", 37, "檢查")
            If ret = 2 Then
                Close()
            End If
        Else
            MsgBox("所選擇的文件是：" & SelectFile)
        End If
    End Sub
    Private Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim x
        x = Shell(SelectFile, AppWinStyle.NormalFocus)
    End Sub
    Private Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click
        Close()
    End Sub
End Class