unit1.pas

DELPHI经典程序

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    ListBox1: TListBox;
    Button1: TButton;
    Memo1: TMemo;
    Label1: TLabel;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Label2: TLabel;
    Label3: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
  var
    X:Integer;
begin
 Memo1.Lines.Clear;
 for X:=0 to ListBox1.Items.Count-1 do
  if ListBox1.Selected[X] then
    Memo1.Lines.Add('Index = '+IntToStr(x)
                    +' ： '+ListBox1.Items.Strings[X]);

 Label1.Caption:='你共选了 '
                +IntToStr(ListBox1.SelCount)
                +' 个人';

end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  ListBox1.Sorted:=True;
  Button2.Enabled:=False;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  ListBox1.MultiSelect:= not ListBox1.MultiSelect;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  ListBox1.Columns:=0;
  Button4.Enabled:=False;
end;

end.