Imports System.IO

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim read As IO.StreamReader = New IO.StreamReader("D:\複製 -可蘭經\mkq001.htm", System.Text.Encoding.Default)
        TextBox1.Text = read.ReadToEnd()
        read.Close()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        TextBox1.Clear()
        Dim strFileSize As String = ""
        Dim di As New IO.DirectoryInfo("D:\複製 -可蘭經\")
        Dim aryFi As IO.FileInfo() = di.GetFiles("*.htm")
        Dim fi As IO.FileInfo

        For Each fi In aryFi
            TextBox1.AppendText(fi.Name & vbCrLf)
        Next
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        WebBrowser1.Navigate("")
        Dim strFileSize As String = ""
        Dim di As New IO.DirectoryInfo("D:\複製 -可蘭經\")
        Dim aryFi As IO.FileInfo() = di.GetFiles("*.htm")
        Dim fi As IO.FileInfo

        For Each fi In aryFi
            TextBox1.AppendText(fi.Name & vbCrLf)
        Next
    End Sub

    Private Sub TextBox1_DoubleClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.DoubleClick
        TextBox2.Text = TextBox1.SelectedText
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        WebBrowser1.Navigate("D:\複製 -可蘭經\" & TextBox2.Text)
        TextBox1.Text = WebBrowser1.Document.Body.InnerText
    End Sub
End Class