[Страдалецъ]

Видимо что-то в таком ключе надо?

Код:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Jpeg, DBCtrls, DB, DBClient, Grids, DBGrids, CheckLst;

type
  TForm1 = class(TForm)
    CheckListBox1: TCheckListBox;
    Memo1: TMemo;
    procedure CheckListBox1DblClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Memo1DblClick(Sender: TObject);
    procedure CheckListBox1ClickCheck(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TCheckItemProperties = class
   Weight: Real;
   Height: Integer;
   Old: Integer;
   constructor Create(W: Real; H, O: Integer);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.CheckListBox1DblClick(Sender: TObject);
begin
 with TCheckItemProperties(CheckListBox1.Items.Objects[CheckListBox1.ItemIndex])
 do ShowMessage(Format('%5.2f %d %d',[Weight, Height, Old]));
end;

constructor TCheckItemProperties.Create(W: Real; H, O: Integer);
begin
 Weight := W;
 Height := H;
 Old := O;
end;

procedure TForm1.FormCreate(Sender: TObject);
Var i: Integer;
begin
 for i := 0 to CheckListBox1.Items.Count - 1
 do begin
    CheckListBox1.Items.Objects[i] := TCheckItemProperties.Create(1.1+i, 156, 21);
    end;
end;

procedure TForm1.Memo1DblClick(Sender: TObject);
begin
 if CheckListBox1.ItemIndex = -1 then Exit;
 CheckListBox1.Items[CheckListBox1.ItemIndex] := Memo1.Lines[0]
end;

procedure TForm1.CheckListBox1ClickCheck(Sender: TObject);
begin
 Memo1.Lines[0] := CheckListBox1.Items[CheckListBox1.ItemIndex];
end;

end.