Vb.net document.getelementbyid() not working with chromium

[nitrozity]

The new code I tried didn't seem to work so I'm looking for guidance on how my VB code setup for an IE browser can be converted to work in Chromium:

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    Value.Text = Value.Text - 1

    If Value.Text = 0 And
        WebBrowser1.DocumentText.Contains(User.Text) Then

        WebBrowser1.Document.GetElementById("msg").InnerText = R1.Text
       WebBrowser1.Document.GetElementById("submit").InvokeMember("Click")
        Value.Text = 240
        LatestActivity.Text = (DateTime.Now.ToString())

    End If
End Sub

The new code I've started with is simply:

browser.ExecuteScriptAsync("document.GetElementById('message').InnerText;" = R1.Text)

But I unfortunately had no luck with it so any guidance is greatly appreciated.