vb.net - 在 VB.NET 中处理 MSHTML.Document 鼠标事件时 IE 冻结

Question

我需要在我的应用程序 IE 浏览器中捕获单击元素的属性。一切正常，我能够捕获属性，但 IE 窗口没有响应。即，如果我单击文本框，则不会显示光标，并且鼠标滚动将不起作用。

Imports System.Runtime.InteropServices
Imports mshtml
Public Class Form1
    Dim WithEvents IE As New SHDocVw.InternetExplorer()
    Dim WithEvents Doc As New mshtml.HTMLDocument
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim Empty As Object = 0
        Dim URL As Object = "file://D:/AtestWeb/index_Calls_popup.htm"

        ' override BeforeNavigate2 event
        'IE.BeforeNavigate2 = New SHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(AddressOf e1.OnBeforeNavigate2)

        IE.Visible = True
        IE.Navigate(URL)

        'IE.Navigate2(URL, Empty, Empty, Empty, Empty)

        System.Threading.Thread.Sleep(5000)
    End Sub
    Private Sub IE_DocumentComplete(ByVal pDisp As Object, ByRef URL As Object) Handles IE.DocumentComplete
        Doc = IE.Document
    End Sub
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        CheckForIllegalCrossThreadCalls = False
    End Sub
    Private Sub Doc_onmouseup() Handles Doc.onmouseup
        ListBox1.Items.Add(Doc.activeElement.innerText)
    End Sub
End Class

如果我删除鼠标事件一切正常。

提前感谢您的帮助。