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六、获得Ie窗口的标题和网址
在上一小节，我们创建了从Internet Explorer_Server句柄获得IHTMLDocument2对象的方法：getDocumentfromIES()
在 vb.net 教程 12-4 msHtml 1 ，已经学习过获得IHTMLDocument2的用处。
这里以获得当前打开的Ie窗口为例说明如何获得标题和网址：
创建一个自定义结构用来存储相关信息：
Public Structure IeDocStructure
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
Dim title As String 'Document title
Dim url As String '网址
End Structure
具体实现代码：
''' <summary>
''' 获得所有打开IE的 mshtml.IHTMLDocument2
''' </summary>
''' <returns>返回所有mshtml.IHTMLDocument2 ArrayList</returns>
''' <remarks></remarks>
Public Function getIhtmlDoc() As ArrayList
Dim IEDocArray As New ArrayList
Dim IEDocInfo As IeDocStructure
'获得IEWindowHwnd结构的ArrayList
Dim IESArray As New ArrayList
IESArray = getIEServer()
If IESArray.Count = 0 Then Return IESArray
'循环获得返回的IEWindowHwnd结构
For i As Integer = 0 To IESArray.Count - 1
Dim IESHwnd As IEWindowHwnd = CType(IESArray(i), IEWindowHwnd)
'记录IE窗口的Hwnd
IEDocInfo.IEhwnd = IESHwnd.IEhwnd
'记录Frame Tab 窗口的Hwnd
IEDocInfo.FTabhwnd = IESHwnd.FTabhwnd
'记录Internet Explorer_Server窗口的Hwnd
IEDocInfo.IE_SHwnd = IESHwnd.Ie_SHwnd
'获得IHTMLDocument2接口
Dim IEdoc As mshtml.IHTMLDocument2
IEdoc = getDocumentfromIES(IESHwnd.Ie_SHwnd)
If IEdoc Is Nothing Then
Else
'当前的Url
IEDocInfo.url = IEdoc.url
'当前IE网页文档的标题
IEDocInfo.title = IEdoc.title
Select Case IEdoc.url
Case "about:blank" '如果无标题，且网址为about:blank
IEDocInfo.title = "about:blank"
Case "about:tabs" '如果无标题，且网址为about:tabs
IEDocInfo.title = "about:tabs"
Case Else
If IEdoc.title = "" Then
IEDocInfo.title = IEdoc.url
End If
IEDocArray.Add(IEDocInfo)
End Select
End If
Next
'返回IeDocStructure结构的ArrayList
Return IEDocArray
End Function
测试用代码：
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
ListBox1.Items.Clear()
Dim listIe As New ArrayList
listIe = getIhtmlDoc()
If listIe.Count > 0 Then
For i As Integer = 0 To listIe.Count - 1
ListBox1.Items.Add(CType(listIe.Item(i), IeDocStructure).title)
Next
End If
End Sub
运行时情况：
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
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