unit1.pas

Delphi7基础编程,本人的入门教材

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Bevel1: TBevel;
    Bevel2: TBevel;
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    Label3: TLabel;
    Bevel3: TBevel;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Bevel4: TBevel;
    Edit4: TEdit;
    ListBox1: TListBox;
    ClientSock1: TClientSocket;
    procedure Button1Click(Sender: TObject);
    procedure ClientSock1Connect(Sender: TObject; Socket: TCustomWinSocket);
    procedure ClientSock1Error(Sender: TObject; Socket: TCustomWinSocket;
      ErrorEvent: TErrorEvent; var ErrorCode: Integer);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);

  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  portno:integer;
implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
button1.enabled:=false;
edit1.enabled:=false;
edit2.enabled:=false;
edit3.enabled:=false;
edit4.enabled:=false;
button2.enabled:=true;
portno:=strtoint(edit2.text);
ClientSock1.address:=edit1.text;
ClientSock1.port:=portno;
ClientSock1.active:=true;
end;

procedure TForm1.ClientSock1Connect(Sender: TObject; Socket: TCustomWinSocket);
label son;
begin
listbox1.items.add('找到打开端口 : '+inttostr(portno));
ClientSock1.active:=false;
portno:=portno+1;
if portno > strtoint(edit3.text) then goto son else
ClientSock1.address:=edit1.text;
ClientSock1.port:=portno;
ClientSock1.active:=true;
son:

end;

procedure TForm1.ClientSock1Error(Sender: TObject; Socket: TCustomWinSocket;
  ErrorEvent: TErrorEvent; var ErrorCode: Integer);
label son;
begin
errorcode:=0;
edit4.text:='扫描端口 : '+inttostr(portno);
ClientSock1.active:=false;
portno:=portno+1;
if portno > strtoint(edit3.text) then goto son else
ClientSock1.address:=edit1.text;
ClientSock1.port:=portno;
ClientSock1.active:=true;
son:

end;

procedure TForm1.Button2Click(Sender: TObject);
begin
portno:=strtoint(edit3.text);
button1.enabled:=true;
edit1.enabled:=true;
edit2.enabled:=true;
edit3.enabled:=true;
edit4.enabled:=true;
button2.enabled:=false;

end;

procedure TForm1.Button3Click(Sender: TObject);
begin
edit4.text:='';
listbox1.items.clear;

end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
ClientSock1.active:=false;
end;



end.