Help with regular expressions in C#

//  using System.Text.RegularExpressions;

/// <summary>
///  Regular expression built for C# on: Thu, Mar 24, 2011, 07:26:23 PM
///  Using Expresso Version: 3.0.3634, http://www.ultrapico.com
///
///  A description of the regular expression:
///
///  \b\w+\b
///      First or last character in a word
///      Alphanumeric, one or more repetitions
///      First or last character in a word
///
///
/// </summary>
public static Regex regex = new Regex(
      "\\b\\w+\\b",
    RegexOptions.Multiline
    | RegexOptions.CultureInvariant
    | RegexOptions.Compiled
    );


// This is the replacement string
public static string regexReplace =
      "<Hello>";


//// Replace the matched text in the InputText using the replacement pattern
// string result = regex.Replace(InputText,regexReplace);

//// Split the InputText wherever the regex matches
// string[] results = regex.Split(InputText);

//// Capture the first Match, if any, in the InputText
// Match m = regex.Match(InputText);

//// Capture all Matches in the InputText
// MatchCollection ms = regex.Matches(InputText);

//// Test to see if there is a match in the InputText
// bool IsMatch = regex.IsMatch(InputText);

//// Get the names of all the named and numbered capture groups
// string[] GroupNames = regex.GetGroupNames();

//// Get the numbers of all the named and numbered capture groups
// int[] GroupNumbers = regex.GetGroupNumbers();