Necesito ayuda con el manejo de archivos usando delphi 7

[mauser1985]

A ok .

unit gid1;

interface

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

type
TForm1 = class(TForm)
OpenDialog1: TOpenDialog;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Edit1: TEdit;
Button4: TButton;
procedure Button3Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
slfile: tstringlist;
slfilenuevo:tstringlist;
filename:string;
Numerofile:integer;
flginicio,flgfin: boolean;
nombre:string;

implementation

{$R *.dfm}

procedure TForm1.Button3Click(Sender: TObject);
begin
Application.Terminate;
end;

procedure TForm1.Button1Click(Sender: TObject);


begin

slfile:=tstringlist.create;
slfilenuevo:=tstringlist.create;

if opendialog1.execute then
begin
filename:=opendialog1.filename;
slfile.loadfromfile(filename);
end;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
i: integer;
begin
flginicio:=false;
flgfin:= false;
numerofile:=1;
for i:=0 to slfile.count - 1 do
begin
if slfile[i]= '*Node' then
flginicio:=true;
if slfile[i]= '*Element' then
flgfin:=true;
if (flgInicio=True) and (flgFin=False) then
slFileNuevo.Add(slFile[i+1]);
if flgFin=True then
begin

showmessage(' Holaaaaa ');
slFileNuevo.SaveToFile(nombre+'.bas');
flgInicio := False;
flgFin := False;
Inc(NumeroFile);
end;
end;
end;
procedure TForm1.Button4Click(Sender: TObject);


begin
nombre:= edit1.Text;
end;

end.