unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
ListBox1: TListBox;
procedure Button2Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
ServerSocket1:TServerSocket;


implementation

{$R *.dfm}

procedure TForm1.Button2Click(Sender: TObject);
begin
close;
end;

procedure TForm1.Button1Click(Sender: TObject);
var

I : integer;

begin

ListBox1.Items.Clear;

for I := 0 to 10000 do

begin

ServerSocket1.Close;

ServerSocket1.Port := I;

try

ServerSocket1.Open;

except

ListBox1.Items.Add(IntToStr(I) + '端口被打开');

end;

end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
ServerSocket1:=TServerSocket.Create(self);

ServerSocket1.Active:=true;

end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
ServerSocket1.Free;
end;

end.