主题：[求助]能不能多线程检索

mark word高亮查找

Dim app As New MSWord.Application
try
    Dim dlg As New FolderBrowserDialog
    If dlg.ShowDialog = DialogResult.Ok Then
        MessageBox.Show("需要检索的文档目录是:" & dlg.SelectedPath,"提示")
    End If
    Dim s As String = ""
    For Each file As String In FileSys.GetFiles(dlg.SelectedPath)
        If file.ToLower.EndsWith(".doc") Then
            Dim doc = app.Documents.Open(file)
            Dim gjzs As String = "Test|Abcdefg|test"
            Dim flag As Boolean = False
            For Each gjz As String In gjzs.split("|")
                app.ActiveWindow.Selection.WholeStory
                With app.ActiveWindow.Selection.Find
                    .HitHighlight(gjz, RGB(255, 255, 0), , , , , , , True)
                End With
                If app.ActiveWindow.Selection.Find.Execute Then flag = True
            Next
            If flag = False  Then
                Doc.close
            Else
                s = s & IIF(s>"", chr(13), "") & file
            End If
        End If
    Next
    If s > "" Then
        MessageBox.Show("共计找到包含关键字的文档有" & s.Split(chr(13)).Length & "个,目录如下:" & vbcrlf & s,"关键字文档查找",MessageBoxButtons.OK,MessageBoxIcon.None)
        app.Visible = True
    Else
        MessageBox.Show("没有找到包含关键字的文档","关键字文档查找",MessageBoxButtons.OK,MessageBoxIcon.None)
        app.quit
    End If
    
catch ex As exception
    msgbox(ex.message)
    app.Quit
finally
End try