unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Memo1: TMemo;
    Button1: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
    procedure ListBox1Enter(Sender: TObject);
    procedure ListBox1Exit(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  Memo1.Lines.Add(Edit1.Text);       //添加國名到Tmemo中
  If ListBox1.ItemIndex>=0           //用戶在ListBox中已作選擇
    Then Memo1.Lines.Add(ListBox1.Items[ListBox1.ItemIndex]) //添加大洲名到Memo中
end;

procedure TForm1.ListBox1Enter(Sender: TObject);
begin
  ListBox1.Color:=ClSkyBlue;
end;

procedure TForm1.ListBox1Exit(Sender: TObject);
begin
  ListBox1.Color:=ClWindow;
end;

end.