对象引用未设置为vb.net错误中的对象实例

问题描述

Private Sub WebBrowser1_NewWindow(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles WebBrowser1.NewWindow


       Dim thiselement As HtmlElement = WebBrowser1.Document.ActiveElement

       Dim targeturl As String = thiselement.GetAttribute("href")

       e.Cancel = True
       Dim window As New Form1
       window.Show()
       window.WebBrowser1.Navigate(targeturl)


   End Sub

' I HAVE OPEN A NEW WEBBROWSER WINDOW IN VB.NET FORM AND I HAVE FOUND ERROR AT HREF

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