infinite while loop for Find.Execute & Word.Range & Range.Hyperlink for VSTO C#

Hi All,

I'm stuck on a weird problem...for Word Add-In with VSTO for Visual Studio 2008 C#.

The code below is executed from the searchDoc method. What is currently happening, when the code is executed it finds the word 'test' and then bolds/italics/hyperlinks it..the second 'test' word is then found(e.g 'this is a test, test again')
and it is then again bold/italic/hyperlinked however, it keeps repeating this process for the last word that is found in the document.
The problem only occurs for this section of code :
    doc.Hyperlinks._Add(rngDoc, ref oAddress, ref missing);

If I comment that out, it works fine, its like the range is adusted from that hyperlink method. I can't figure out how to re-adjust the range or to terminate the loop?

Can anyone help?

See the code below:

 private void searchDoc()
        {
            bool wordFound = true;
            String url = "http://www.test.com";
            Object findWord = "test";
            Object forward = true;
            Object wrap = WdFindWrap.wdFindContinue;
            //Object wrap = Type.Missing;
            Object start = 0;
            int start1 = 0;

            Document doc = Globals.ThisAddIn.Application.ActiveDocument;
            Object end = doc.Characters.Count;
            int end2 = doc.Characters.Count;
            doc.Paragraphs[1].Range.Find.ClearFormatting();

            Range rngDoc = doc.Range(ref start, ref end);
            Find fnd = rngDoc.Find;
            fnd.Forward = true;
            wordFound = executeFind(fnd, wrap, forward, findWord);
            while (fnd.Found)
            {

                MessageBox.Show("Text found.");
                rngDoc.Select();
                boldWord(doc, rngDoc, url, null);
                //start = rngDoc.End;
                //start1 = rngDoc.End+1;
                //end = doc.Characters.Count;
                //end2 = doc.Characters.Count;
                //rngDoc.Start = start1;
                //rngDoc.End = end2;
                //if (start1.Equals(end2))
                //{
                //    wordFound = false;
                //}
                wordFound = executeFind(fnd, wrap, forward, findWord);
            }
            }

  private void boldWord(Document doc, Range rngDoc, String url, String foundWord)
        {
            Object missing = System.Reflection.Missing.Value;
            Object oAddress = url;
            Object oRange = rngDoc;
            rngDoc.Bold = 1;
            rngDoc.Italic = 1;
            doc.Hyperlinks._Add(rngDoc, ref oAddress, ref missing);
        }
       private Boolean executeFind(Find find, Object wrapFind, Object forwardFind, Object findWord)
        {
            // Simple wrapper around Find.Execute:
            Object findText = findWord;
            Object matchCase = Type.Missing;
            Object matchWholeWord = Type.Missing;
            Object matchWildCards = Type.Missing;
            Object matchSoundsLike = Type.Missing;
            Object nmatchAllWordForms = Type.Missing;
            Object forward = forwardFind;
            Object wrap = Type.Missing;
            Object wrap = wrapFind;
            Object format = Type.Missing;
            Object replaceWithText = Type.Missing;
            Object replace = Type.Missing; //object replace = WdReplace.wdReplaceNone;
            Object matchKashida = Type.Missing;
            Object matchDiacritics = Type.Missing;
            Object matchAlefHamza = Type.Missing;
            Object matchControl = Type.Missing;

            return find.Execute(ref findText, ref matchCase,
                  ref matchWholeWord, ref matchWildCards,
                  ref matchSoundsLike, ref nmatchAllWordForms,
                  ref forward, ref wrap, ref format,
                  ref replaceWithText, ref replace,
                  ref matchKashida, ref matchDiacritics,
                 ref matchAlefHamza, ref matchControl);
        }


Thank you!!