How to add URL comment to word document using c#?

Question

This is my code. I can put comment but I want to put URL in the comment. How can I do this?

  using Microsoft.Office.Interop.Word;
  using Microsoft.Office.Core;

  private void button3_Click(object sender, EventArgs e)
    {
        // Open a doc file.
        Microsoft.Office.Interop.Word.Application application = new Microsoft.Office.Interop.Word.Application();
        Microsoft.Office.Interop.Word.Document document = application.Documents.Open(@"e:\temp3.docx");
        object comment = "www.google.com" + Environment.NewLine;
        object missing = System.Reflection.Missing.Value;
        Microsoft.Office.Interop.Word.Comment var = document.Comments.Add(document.Words[1], comment);
        try {
            document.Hyperlinks.Add(var.Range,ref missing,ref missing,ref missing,ref missing,ref missing);
        }
        catch (Exception ex)
        { MessageBox.Show(ex.ToString()); }
        document.Close();
        application.Quit();
    }

But result is this

And bad parameter exception in Hyperlink.add

Answer 1

    private void button3_Click(object sender, EventArgs e)
    {
        // Open a doc file.
        Microsoft.Office.Interop.Word.Application application = new Microsoft.Office.Interop.Word.Application();
        Microsoft.Office.Interop.Word.Document document = application.Documents.Open(@"e:\temp3.docx");
        object comment = "www.google.com" + Environment.NewLine;
        object missing = System.Reflection.Missing.Value;
        Microsoft.Office.Interop.Word.Comment var = document.Comments.Add(document.Words[1], comment);
        try {
            document.Hyperlinks.Add(var.Range,ref comment,ref missing,ref missing,ref missing,ref missing);
        }
        catch (Exception ex)
        { MessageBox.Show(ex.ToString()); }
        document.Close();
        application.Quit();
    }

In HyperLinks.Add instead of ref comment i had put ref missing .