ArrayList USStates = new ArrayList()   ;
         USStates.Add(new USState( "Alabama" ,  "AL" ,true));
         USStates.Add(new USState( "Washington" ,  "WA" ,true))  ; 
         USStates.Add(new USState( "West Virginia" ,  "WV" ,false));
         USStates.Add(new USState( "Wisconsin" ,  "WI" ,false)) ;
         USStates.Add(new USState( "Wyoming" ,  "WY" ,false));

         ListBox1.SelectedValueChanged += new EventHandler(ListBox1_SelectedValueChanged);
         ListBox1.DataSource = USStates;
         ListBox1.DisplayMember =  "LongName" ;
         ListBox1.ValueMember =  "ShortName" ;

using System;
using System.Collections;
using System.Windows.Forms;
using System.Drawing;

namespace MyListBox{
	class FileOutlook{
		string extention;
		string description;
		bool enable;
		
		public FileOutlook(string extention, string description, bool enable){
			this.extention = extention;
			this.description = description;
			this.enable = enable;
		}
		public string Extention{
			get{return(extention);}
			set{extention = value;}
		}
		public string Description{
			get{return(description);}
			set{description = value;}
		}
		public bool Enable{
			get{return(enable);}
			set{enable = value;}
		}
	}

	class FORow {
		ArrayList row;

		public FORow(){
			row = new ArrayList( 40 );
		}

		public ArrayList GetArrayList(){return row;}

		public void Load(){
			row.Add(new FileOutlook(  "ade" ,  "Microsoft Access project extension" ,false));
			row.Add(new FileOutlook(  "adp" ,  "Microsoft Access project" ,false));
			row.Add(new FileOutlook(  "bas" ,  "Microsoft Visual Basic class module" ,false));
			row.Add(new FileOutlook(  "bat" ,  "Batch file" ,false));
			row.Add(new FileOutlook(  "chm" ,  "Compiled HTML Help file" ,true));
			row.Add(new FileOutlook(  "cmd" ,  "Microsoft Windows NT Command Script" ,false));
			row.Add(new FileOutlook(  "com" ,  "Microsoft MS-DOS program" ,false));
			row.Add(new FileOutlook(  "cpl" ,  "Control Panel extension" ,false));
			row.Add(new FileOutlook(  "crt" ,  "Security certificate" ,true));
			row.Add(new FileOutlook(  "exe" ,  "Program" ,false));
			row.Add(new FileOutlook(  "hlp" ,  "Help file" ,false));
			row.Add(new FileOutlook(  "hta" ,  "HTML program" ,false));
			row.Add(new FileOutlook(  "inf" ,  "Setup  Information" ,false));
			row.Add(new FileOutlook(  "ins" ,  "Internet Naming Service" ,false));
			row.Add(new FileOutlook(  "isp" ,  "Internet Communication settings" ,true));
			row.Add(new FileOutlook(  "js" ,  "JScript file" ,false));
			row.Add(new FileOutlook(  "jse" ,  "Jscript Encoded Script file" ,false));
			row.Add(new FileOutlook(  "lnk" ,  "Shortcut" ,false));
			row.Add(new FileOutlook(  "mda" ,  "Microsoft Access add-in program" ,false));
			row.Add(new FileOutlook(  "mdb" ,  "Microsoft Access program" ,false));
			row.Add(new FileOutlook(  "mde" ,  "Microsoft Access MDE database" ,true));
			row.Add(new FileOutlook(  "mdz" ,  "Microsoft Access wizard program" ,false));
			row.Add(new FileOutlook(  "msc" ,  "Microsoft Common Console Document" ,false));
			row.Add(new FileOutlook(  "msi" ,  "Microsoft Windows Installer package" ,false));
			row.Add(new FileOutlook(  "msp" ,  "Windows Installer patch" ,false));
			row.Add(new FileOutlook(  "mst" ,  "Visual Test source files" ,false));
			row.Add(new FileOutlook(  "pcd" ,  "Photo CD image or Microsoft Visual Test compiled script" ,false));
			row.Add(new FileOutlook(  "pif" ,  "Shortcut to MS-DOS program" ,true));
			row.Add(new FileOutlook(  "reg" ,  "Registration entries" ,false));
			row.Add(new FileOutlook(  "scr" ,  "Screen saver" ,false));
			row.Add(new FileOutlook(  "sct" ,  "Windows Script Component" ,false));
			row.Add(new FileOutlook(  "shs" ,  "Shell Scrap Object" ,false));
			row.Add(new FileOutlook(  "url" ,  "Internet shortcut" ,false));
			row.Add(new FileOutlook(  "vb" ,  "VBScript file" ,false));
			row.Add(new FileOutlook(  "vbe" ,  "VBScript Encoded Script file" ,false));
			row.Add(new FileOutlook(  "vbs" ,  "VBScript file" ,false));
			row.Add(new FileOutlook(  "wsc" ,  "Windows Script Component" ,false));
			row.Add(new FileOutlook(  "wsf" ,  "Windows Script file" ,false));
			row.Add(new FileOutlook(  "wsh" ,  "Windows Script Host Settings file" ,false));
		}

	}

	class ExtControl : Panel{
		CheckedListBox clbExtention = new CheckedListBox();
		//FORow _frrw = new FORow();
		
		public ExtControl(string lblCategoryText, FORow frrw){
			//_frrw=frrw;
			clbExtention.CheckOnClick = true;

			//не могу программно проставить флажки
			clbExtention.DataSource=frrw.GetArrayList();
			clbExtention.DisplayMember =  "Description" ;
			clbExtention.ValueMember =  "Extention" ;

			clbExtention.Dock=DockStyle.Fill;
			clbExtention.Parent = this;
			this.Dock = DockStyle.Left;
			this.Size = new Size( 280 ,  140 );
		}

		internal void ShowChecked()
		{
			string ss= "";
			foreach(FileOutlook s1 in clbExtention.CheckedItems)ss+=s1.Extention+"  ;  ";
			MessageBox.Show(ss=="  " ? " No checked... ": ss );
			//MessageBox.Show(clb.SelectedValue.ToString());
		}

	}

	class Form1 : Form 
	{
		FORow frrw = new FORow();
		
		ExtControl ec;
		Button btn = new Button();
		
		public Form1() 
		{
			frrw.Load();
			
			ec = new ExtControl("  ",frrw);
			ec.Parent=this;

			btn.Parent=this;
			btn.ClientSize = new Size(100 , 25 );
			btn.Location=new Point( 300 , 5 );
			btn.Text = "Checked? ";
			btn.Click += new EventHandler(btnClick);
			
			ClientSize = new Size(410 , 200 );
			Text="CheckedListBox.DataSource TEST";
			this.DockPadding.All= 5 ;
		}

		private void btnClick(object sender, EventArgs ea){ec.ShowChecked();}

		public static void Main(){Application.Run(new Form1());}

	}
}