vb.net 教程 20-3 控制Ie浏览器 4

三、获得Ie窗口 Frame Tab 句柄

IEFrame->Frame Tab->TabWindowClass->shell DocObject View->Internet Explorer_Server

上一小节获得了IEFrame句柄，本节继续获得Frame Tab 句柄

先自定义一个结构，用来保存相关句柄信息

    Private Structure IEWindowHwnd
        Dim IEhwnd As Integer   'IE窗口句柄
        Dim FTabhwnd As Integer 'Frame Tab的窗口句柄
        Dim Ie_SHwnd As Integer '对应IE_Server的窗口句柄
    End Structure

本小节中，Ie_SHwnd暂时用不上。

获得Frame Tab句柄的代码：

    ''' <summary>
    ''' 获得指定IE窗口中的"Frame Tab",可能存在多个
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Private Function getIEFrameTab() As ArrayList
        Dim IEFrameTabHwndArray As New ArrayList

        Dim IEframeTabHwnd As IEWindowHwnd

        '获得所有的IEFrame句柄
        Dim IEHwndArray As New ArrayList
        IEHwndArray = findAllIe()
        '如果IEFrame数量为0，那么就立即返回空IEFrameTabHwndArray
        If IEHwndArray.Count = 0 Then Return IEFrameTabHwndArray

        Dim result As Integer
        '需要查找类名"FrameTab"
        Dim ieClass As String = "Frame Tab"
        '循环获得FrameTab Hwnd
        For i As Integer = 0 To IEHwndArray.Count - 1
            Try
                '从IEFrame句柄获得它下面的第一个FrameTab句柄
                result = FindWindowEx(CType(IEHwndArray(i),Integer),ieClass,Nothing)
                Do While result <> 0
                    '记录IE窗口的Hwnd,一直传递下去
                    IEframeTabHwnd.IEhwnd = CType(IEHwndArray(i),Integer)
                    '记录当前FrameTab窗口的Hwnd,一直传递下去
                    IEframeTabHwnd.FTabhwnd = result
                    '用于记录IE_Server的窗口句柄，暂时用不上
                    IEframeTabHwnd.Ie_SHwnd = 0

                    IEFrameTabHwndArray.Add(IEframeTabHwnd)
                    '从IEFrame句柄获得它下面的下一个FrameTab句柄，直到返回0
                    result = FindWindowEx(CType(IEHwndArray(i),result,Nothing)
                Loop
            Catch ex As Exception
                Continue For
            End Try
        Next
        Return IEFrameTabHwndArray
    End Function

测试用的调用代码：

    Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click
        ListBox1.Items.Clear()

        Dim listIe As New ArrayList
        listIe = getIEFrameTab()
        If listIe.Count > 0 Then
            For i As Integer = 0 To listIe.Count - 1
                ListBox1.Items.Add(CType(listIe.Item(i),IEWindowHwnd).FTabhwnd)
            Next
        End If
    End Sub

由于.net平台下C#和vb.NET很相似，本文也可以为C#爱好者提供参考。

学习更多vb.net知识，请参看vb.net 教程 目录

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!