[NumLock]

Код:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, CheckLst;

type
  TForm1 = class(TForm)
    CheckListBox1: TCheckListBox;
    Memo1: TMemo;
    Button1: TButton;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  i: Integer;
  stringlist: TStrings;
begin
  Memo1.Clear;
  stringlist:=TStringList.Create;
  try
    for i:=0 to CheckListBox1.Count-1 do
      if CheckListBox1.Checked[i] then
      begin
        stringlist.LoadFromFile(CheckListBox1.Items[i]);
        Memo1.Lines.AddStrings(stringlist);
      end;
  finally
    stringlist.Free;
  end;
  Label1.Caption:=IntToStr(Memo1.Lines.Count);
end;

end.