A Really Vain "How are my articles doing" Web Spider

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using Microsoft.Win32;


namespace VainWebSpider
{
    #region Program CLASS
    /// <summary>
    /// provides the main access point into the application. Also
    /// provides several generic helper methods, such as InputBox(..),
    /// ErrorBox(..),InfoBox(..) and also provides read/write funtions
    /// to store the current UserID within the registry
    /// </summary>
    public static class Program
    {
        #region Instance fields
        //instance fields
        private static long userId;

        #endregion
        #region Public Methods/Properties

        /// <summary>
        /// gets or sets the UserID which will be used to retrieve codeproject
        /// articles for. When a new UserID is set, the new value is also written
        /// to the windows registry, using the writeToRegistry(..) method. This 
        /// ensures the next time the VainWebSpider application is run, the last
        /// selected UserID will be used. 
        /// </summary>
        public static long UserID
        {
            get { return Program.userId; }
            set
            {
                Program.userId = value;
                Program.writeToRegistry(value);
            }
        }

        /// <summary>
        /// Creates a new "VainWebSpider" subkey (if none exists) under 
        /// the HKEY_LOCAL_MACHINE\SOFTWARE registry key. It also creates
        /// a new value within the newly created VainWebSpider subkey, for
        /// the userId input parameter. This is done so that the VainWebSpider
        /// application can know which user it was looking at last time
        /// </summary>
        /// <param name="userId">The userId to store within the registry</param>
        public static void writeToRegistry(long userId)
        {
            try
            {
                RegistryKey hklm = Registry.CurrentUser;
                RegistryKey hkSoftware = hklm.OpenSubKey("Software", true);
                RegistryKey hkVainWebSpider = hkSoftware.CreateSubKey("VainWebSpider");
                hkVainWebSpider.SetValue("userId", userId);
            }
            catch (Exception)
            {
                Program.ErrorBox("There was a problem creating the Registry key for VainWebSpider");
            }
        }

        /// <summary>
        /// Returns the userId value within the
        /// HKEY_LOCAL_MACHINE\SOFTWARE\VainWebSpider registry key
        /// </summary>
        /// <returns>The value of the userId value within the
        /// HKEY_LOCAL_MACHINE\SOFTWARE\VainWebSpider registry key, 
        /// if it exists, else returns -1</returns>
        public static long readFromRegistry()
        {
            try
            {
                RegistryKey hklm = Registry.CurrentUser;
                RegistryKey hkSoftware = hklm.OpenSubKey("Software");
                RegistryKey hkVainWebSpider = hkSoftware.OpenSubKey("VainWebSpider");
                return long.Parse(hkVainWebSpider.GetValue("userId").ToString());
            }
            catch (Exception)
            {
                return -1;
            }
        }

        /// <summary>
        /// InputBox, returns user input string
        /// </summary>
        /// <param name="prompt">the prompt</param>
        /// <param name="title">the form title</param>
        /// <param name="defaultValue">the default value to use</param>
        /// <returns>the string the user entered</returns>
        public static string InputBox(string prompt,
          string title, string defaultValue)
        {
            InputBoxDialog ib = new InputBoxDialog();
            ib.FormPrompt = prompt;
            ib.FormCaption = title;
            ib.DefaultValue = defaultValue;
            ib.ShowDialog();
            string s = ib.InputResponse;
            ib.Close();
            return s;
        } 

        /// <summary>
        /// Shows an error message within a MessageBox
        /// </summary>
        /// <param name="error">the error message</param>
        public static void ErrorBox(string error)
        {
            MessageBox.Show(error,"Error", MessageBoxButtons.OK,MessageBoxIcon.Error);
        }

        /// <summary>
        /// Shows an information message within a MessageBox
        /// </summary>
        /// <param name="error">the information message</param>
        public static void InfoBox(string info)
        {
            MessageBox.Show(info, "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        /// <summary>
        /// Shows a Yes/No query within a MessageBox
        /// </summary>
        /// <param name="query">the query message</param>
        /// <returns>DialogResult, which is the result of the Confirmation query</returns>
        public static DialogResult YesNoBox(string query)
        {
            return MessageBox.Show(query,
                "Confirmation", MessageBoxButtons.YesNo,
                MessageBoxIcon.Question);
        }
        #endregion
        #region MAIN THREAD
        /// <summary>
        /// The main entry point for the application.
        /// Expects 0 command line arguments
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new frmLoader());

        }
        #endregion
    }
    #endregion
}