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), 0, 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), Integer), result, ieClass, 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。

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