How to Highlight a specific word in WebBrowser control C#

Question

I have a webbrowser control and I am able to get the selected word by the user. I am saving this word in a file and with it I am also saving its byte offset and length.

Answer 1

I am a novice programmer is my best samples. Just spend a lot of time.

Just connect your library

Project - add a link - Overview - windows - system32 - mshtml.tlb

using mshtml;

  private void button1_Click(object sender, EventArgs e)
    {

    webBrowser1.Refresh();

        Application.DoEvents();

        if (webBrowser1.Document != null)
        {

            IHTMLDocument2 document = webBrowser1.Document.DomDocument as IHTMLDocument2;
            if (document != null)
            {
                IHTMLSelectionObject currentSelection = document.selection;

                IHTMLTxtRange range = currentSelection.createRange() as IHTMLTxtRange;

                if (range != null)
                {
                    String search = textBox1.Text;
                    if (search == "")
                    {
                        MessageBox.Show("not selected");                          
                    }
                    else
                    {
                    line1:
                        if ((range.findText(search)) && (range.htmlText != "span style='background-color: rgb(255, 255, 0);'>" + textBox1.Text + ""))
                        {
                            range.select();
                            range.pasteHTML("" + textBox1.Text.ToLower() + "");
                            goto line1;

                        }
                    }

                }
            }
        }
      }