Easy Desktop Web Stats

using System;
using IWshRuntimeLibrary;
using Shell32;
using System.IO;
using System.Windows.Forms;

using MessageManager;

namespace Desktop_Web_Stats
{
    public class Manage 
    {        
        public static string lnkName = "Mega Lotto Web Stats";        

        public static void StartupFolderLnk()
        {
            Properties.Settings settings = Properties.Settings.Default;

            if (settings.autoStart)
            {
                if (!StartUpFolderShortCutExists())
                {
                    try
                    {
                        CreateStartupFolderShortcut();
                    }
                    catch
                    {
                        Dialog.Message("Error", "The Startup Folder Shortcut could not be created.",
                                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }

            if (!settings.autoStart)
            {
                if (StartUpFolderShortCutExists())
                {
                    try
                    {
                        DeleteStartupFolderShortcuts(Path.GetFileName(Application.ExecutablePath));
                    }
                    catch { }
                }
            }
        }

        private static bool StartUpFolderShortCutExists()
        {            
            string startUpFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.Startup);
            string appExeName = Path.GetFileName(Application.ExecutablePath);

            DirectoryInfo folder = new DirectoryInfo(startUpFolderPath);
            FileInfo[] files = folder.GetFiles("*.lnk");

            foreach (FileInfo file in files)
            {
                string shortcutTargetFile = GetShortcutTargetFile(file.FullName);
                if (shortcutTargetFile.EndsWith(appExeName, StringComparison.InvariantCultureIgnoreCase))
                {                   
                    return true;
                }
            }           
            return false;
        }

        private static void CreateStartupFolderShortcut()
        {
            WshShellClass wshShell = new WshShellClass();            
            string startUpFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.Startup);
            IWshRuntimeLibrary.IWshShortcut shortcut = (IWshRuntimeLibrary.IWshShortcut)wshShell
                                                       .CreateShortcut(startUpFolderPath + "\\" + Application.ProductName + ".lnk");

            shortcut.TargetPath = Application.ExecutablePath;
            shortcut.WorkingDirectory = Application.StartupPath;
            shortcut.Description = lnkName;            
            shortcut.Save();
        }

        private static string GetShortcutTargetFile(string shortcutFilename)
        {
            string pathOnly = Path.GetDirectoryName(shortcutFilename);
            string filenameOnly = Path.GetFileName(shortcutFilename);

            Shell32.Shell shell = new Shell32.ShellClass();
            Shell32.Folder folder = shell.NameSpace(pathOnly);
            Shell32.FolderItem fileName = folder.ParseName(filenameOnly);
            if (fileName != null)
            {
                Shell32.ShellLinkObject link = (Shell32.ShellLinkObject)fileName.GetLink;
                return link.Path;
            }
            return String.Empty; 
        }

        private static void DeleteStartupFolderShortcuts(string targetExeName)
        {
            string startUpFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.Startup);

            DirectoryInfo folder = new DirectoryInfo(startUpFolderPath);
            FileInfo[] files = folder.GetFiles("*.lnk");

            foreach (FileInfo file in files)
            {
                string shortcutTargetFile = GetShortcutTargetFile(file.FullName);
                if (shortcutTargetFile.EndsWith(targetExeName, StringComparison.InvariantCultureIgnoreCase))
                {
                   System.IO.File.Delete(file.FullName);
                }
            }
        }
    }
}