C# 单击按钮时显示消息

我的表单中有一个名为

WebBrowser1

的webBrowser控件。 我使用以下代码将值拉入复选框和其他控件：

 WebBrowser1.Document.GetElementById("LastName").SetAttribute("value", "MyLastname")'<--- pull value to the textbox
 WebBrowser1.Document.GetElementById("TermsOfService").SetAttribute("value", "yes")'<--- change the value of a check box

---

WebBrowser1.Document.GetElementById（“LastName”）.SetAttribute（“value”，“MyLastname”）”您可以向要监视的按钮添加一个处理程序，例如，我在webbrowser控件的DocumentCompleted事件触发后添加了一个处理程序

Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted

    Dim htmlBtn As HtmlElement = WebBrowser1.Document.GetElementById("BtnID")

    If htmlBtn IsNot Nothing Then 
        AddHandler htmlBtn.click, AddressOf YourSub
    End If

End Sub

Private Sub YourSub()
    messagebox.show("clicked!")
End Sub