vb.net如何访问WebBrowser中的iframe

这是以前vb6的方法，必须引用Microsoft html object library
可是在中没有作用了
单击command1获得框架及其元素方法1
Private Sub Command1_Click()
Dim Doc2 As HTMLDocument
Dim Web2 As WebBrowser_V1
 Set Web2 = GetFrameIframeLikeUrl(WebBrowser1.Document, "*baidu.com*")
If Not Web2 Is Nothing Then
    Set Doc2 = Web2.Document
    'MsgBox "框架网页中的文字是：" & Doc2.body.innerText
End If
End Sub



方法一的自定义函数
Function GetFrameIframeLikeUrl(Vdoc As HTMLDocument, LikeUrl As String) As WebBrowser_V1

Dim Vtag, Tname As String, FrameWeb As WebBrowser_V1
For Each Vtag In Vdoc.All
        Tname = Vtag.tagName
        If Tname = "IFRAME" Or Tname = "FRAME" Then
            Set FrameWeb = Vtag
              If FrameWeb.LocationURL Like LikeUrl Then
 
                  Set GetFrameIframeLikeUrl = FrameWeb
                  Exit Function
             End If
        End If
Next
End Function