Enumerate and Host Control Panel Applets using C#.

using System;
using System.IO;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using AppletEngine;

namespace AppletEngine
{
	/// <summary>
	/// Summary description for AppletViewerWindow.
	/// </summary>
	public class AppletViewerWindow : System.Windows.Forms.Form
	{
		private AppletEngine _appletEngine;
		private ArrayList _appletLibraries;
		private System.Windows.Forms.ColumnHeader columnHeader1;
		private System.Windows.Forms.ColumnHeader columnHeader2;
		private System.Windows.Forms.ListView listView;
		private System.Windows.Forms.ImageList smallImageList;
		private System.Windows.Forms.ImageList largeImageList;
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItemView;
		private System.ComponentModel.IContainer components;

		public AppletViewerWindow()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			
			this.Closed += new EventHandler(AppletViewerWindow_Closed);

			this.LoadViewMenuItems();
			this.CheckMenuItemAccordingToView(this.listView.View);
			this.LoadApplets();						
			this.DisplayApplets();			
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.listView = new System.Windows.Forms.ListView();
			this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
			this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
			this.largeImageList = new System.Windows.Forms.ImageList(this.components);
			this.smallImageList = new System.Windows.Forms.ImageList(this.components);
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItemView = new System.Windows.Forms.MenuItem();
			this.SuspendLayout();
			// 
			// listView
			// 
			this.listView.BackColor = System.Drawing.Color.SteelBlue;
			this.listView.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
																					   this.columnHeader1,
																					   this.columnHeader2});
			this.listView.Dock = System.Windows.Forms.DockStyle.Fill;
			this.listView.ForeColor = System.Drawing.Color.White;
			this.listView.FullRowSelect = true;
			this.listView.LargeImageList = this.largeImageList;
			this.listView.Location = new System.Drawing.Point(0, 0);
			this.listView.Name = "listView";
			this.listView.Size = new System.Drawing.Size(592, 366);
			this.listView.SmallImageList = this.smallImageList;
			this.listView.Sorting = System.Windows.Forms.SortOrder.Ascending;
			this.listView.TabIndex = 0;
			this.listView.DoubleClick += new System.EventHandler(this.listView1_DoubleClick);
			this.listView.SelectedIndexChanged += new System.EventHandler(this.listView1_SelectedIndexChanged);
			// 
			// columnHeader1
			// 
			this.columnHeader1.Text = "Name";
			this.columnHeader1.Width = 100;
			// 
			// columnHeader2
			// 
			this.columnHeader2.Text = "Description";
			this.columnHeader2.Width = 403;
			// 
			// largeImageList
			// 
			this.largeImageList.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
			this.largeImageList.ImageSize = new System.Drawing.Size(32, 32);
			this.largeImageList.TransparentColor = System.Drawing.Color.Magenta;
			// 
			// smallImageList
			// 
			this.smallImageList.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
			this.smallImageList.ImageSize = new System.Drawing.Size(16, 16);
			this.smallImageList.TransparentColor = System.Drawing.Color.Magenta;
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItemView});
			// 
			// menuItemView
			// 
			this.menuItemView.Index = 0;
			this.menuItemView.Text = "View";
			// 
			// AppletViewerWindow
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(592, 366);
			this.Controls.Add(this.listView);
			this.Menu = this.mainMenu1;
			this.Name = "AppletViewerWindow";
			this.Text = "Available Control Panel Applets";
			this.ResumeLayout(false);

		}
		#endregion

		private void DisplayApplets()
		{
			foreach(AppletLibrary appletLibrary in _appletLibraries)
			{
				foreach(Applet applet in appletLibrary.Applets)
				{
					ListViewItem item = new ListViewItem();
					item.Text = applet.Name;
					item.SubItems.Add(applet.Description);
					item.Tag = applet;					
					
					item.ImageIndex = this.smallImageList.Images.Count;

					if (applet.SmallImage != null)
					{						
						this.smallImageList.Images.Add(applet.SmallImage);
					}

					if (applet.LargeImage != null)
					{
						this.largeImageList.Images.Add(applet.LargeImage);
					}

					this.listView.Items.Add(item);
				}
			}
		}

		private void AppletViewerWindow_Closed(object sender, EventArgs e)
		{
			foreach(AppletLibrary appletLibrary in _appletLibraries)
				appletLibrary.Dispose();
		}

		private void listView1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
		
		}

		private void listView1_DoubleClick(object sender, System.EventArgs e)
		{
			try
			{
				ListViewItem item = this.listView.SelectedItems[0];
				if (item != null)
				{
					Applet applet = item.Tag as Applet;
					applet.Open();
				}
			}
			catch(System.Exception systemException)
			{
				System.Diagnostics.Trace.WriteLine(systemException);
			}
		}

		private void LoadApplets()
		{
			_appletEngine = new AppletEngine();
			FileInfo[] libraries = _appletEngine.FindAppletLibraries(System.Environment.SystemDirectory);
			_appletLibraries = _appletEngine.CreateApplets(libraries, this.Handle);
		}

		private void LoadViewMenuItems()
		{
			Array views = Enum.GetValues(typeof(System.Windows.Forms.View));
			foreach(System.Windows.Forms.View view in views)
			{
				MenuItem mi = new MenuItem(view.ToString(), new EventHandler(this.OnMenuItemClicked));
				mi.RadioCheck = true;
				this.menuItemView.MenuItems.Add(mi);			
			}
		}

		private void CheckMenuItemAccordingToView(View view)
		{
			foreach(MenuItem mi in this.menuItemView.MenuItems)
				if (mi.Text == view.ToString())
					mi.Checked = true;
				else
					mi.Checked = false;
		}

		private void OnMenuItemClicked(object sender, System.EventArgs e)
		{
			MenuItem mi = sender as MenuItem;
			if (mi != null)
			{
				Array views = Enum.GetValues(typeof(System.Windows.Forms.View));
				foreach(System.Windows.Forms.View view in views)
				{
					if (view.ToString() == mi.Text)
					{
						this.listView.View = view;
						this.CheckMenuItemAccordingToView(view);
					}
				}
			}		
						
		}


	}
}