How can i use vb.net to read and print all html label innerhtml text on a webpage

First look at this simple example:

Dim htmlString = "<form><label for='something'>text text</label></form>"
Dim htmlDoc As New HtmlAgilityPack.HtmlDocument
Dim labelElement = htmlDoc.DocumentNode.SelectSingleNode("//label[@for='something']")
Dim labelText = ""
If labelElement IsNot Nothing Then
     labelText = labelElement.InnerText
End If

now the labelText variable contains text text

And here is an example for loading the html from a given link using WebClient

Dim htmlDoc As New HtmlAgilityPack.HtmlDocument
Dim webClinet As New System.Net.WebClient
Dim html As String = ""
'add your web page link here
html = webClinet.DownloadString("http://yourlink.com/")
htmlDoc.LoadHtml(html)
'and here add your for attribute value for that label instead of something
Dim labelElement =htmlDoc.DocumentNode.SelectSingleNode("//label[@for='something']")
Dim labelText = ""
If labelElement IsNot Nothing Then
    labelText = labelElement.InnerText
End If

Update:since you said you have it already opened in a WebBrowser control use the DocumentText property to get the html text as the following:

Dim htmlDoc As New HtmlAgilityPack.HtmlDocument
htmlDoc.LoadHtml(webBrowser1.DocumentText)
Dim labelElement =htmlDoc.DocumentNode.SelectSingleNode("//label[@for='something']")
Dim labelText = ""
If labelElement IsNot Nothing Then
   labelText = labelElement.InnerText
End If

**Update:**Example on how to get Html string from the WebBrowser control

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        WebBrowser1.Navigate("https://www.google.com")
    End Sub

    Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        MessageBox.Show(WebBrowser1.DocumentText)
    End Sub
End Class