Window Tabifier

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;
using System.Security.Permissions;
using System.Security;

namespace WindowTabifier
{
    public partial class Main : Form
    {
        Properties.Settings set = Properties.Settings.Default;
        About.AboutBox box = new About.AboutBox("Window Tabifier");

        public Main()
        {
            InitializeComponent();

            rdbExeIcon.Checked = !rdbWindowIcon.Checked;

            box.programname = "Window Tabifier";
            box.StartPosition = FormStartPosition.CenterScreen;
            box.BackColor = Color.SandyBrown;
        }

        private bool isstartup()
        {
            bool result = false;
            RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
            result = key.GetValue("Window Tabifier") != null;
            key.Close();
            return result;
        }

        [RegistryPermissionAttribute(SecurityAction.LinkDemand, Write = @"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run")]
        private void startup(bool add)
        {
            RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
            if (add)
            {
                key.SetValue("Window Tabifier", "\"" + Application.ExecutablePath + "\"");
            }
            else
                key.DeleteValue("Window Tabifier", false);

            key.Close();
        }

        private void Exit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            if (!System.IO.File.Exists(Application.StartupPath + "\\Window Tabifier.exe.config"))
            {
                MessageBox.Show("Configuration file not found.", "Error", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
                Application.Exit();
            }
            System.IO.Directory.SetCurrentDirectory(Application.StartupPath);
            winapi.statusbar = winapi.FindWindow("Shell_TrayWnd", "");

            set.Startup = isstartup();
            Tray.ShowBalloonTip(5);
            this.Hide();
        }

        private void Tab_Click(object sender, EventArgs e)
        {
            WindowList wnd = new WindowList();
            if (wnd.ShowDialog() == DialogResult.OK && wnd.SelectedWindows.Count>0)
            {
                Host hostform = new Host(wnd.SelectedWindows);
                hostform.Show();
                wnd.Dispose();
            }
        }

        private void tabAll_Click(object sender, EventArgs e)
        {
            Host hostwindow = null;
            if (Properties.Settings.Default.Ignore)
            {
                hostwindow = new Host(window.GetOpenWindows().FindAll(delegate(window wnd) { return wnd.Title.Length > 0 && wnd.GetExecutablePath() != Application.ExecutablePath; }));
            }
            else
            {
                hostwindow = new Host(window.GetOpenWindows().FindAll(delegate(window wnd) { return wnd.GetExecutablePath() != Application.ExecutablePath; }));
            }
            hostwindow.Show();
        }

        private void Tray_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (!this.Visible)
            {
                this.Show();
                this.WindowState = FormWindowState.Normal;
            }
        }

        private void Main_FormClosing(object sender, FormClosingEventArgs e)
        {
            startup(startupCheck.Checked);

            set.Save();

            if (e.CloseReason == CloseReason.UserClosing)
            {
                this.Hide();
                e.Cancel = true;
            }
        }

        private void About_Click(object sender, EventArgs e)
        {
            if (!box.Visible)
            {
                box.ShowDialog();
            }
        }
    }
}