多线程出错,请问如何解决? ( 积分: 50 )

unit Unit1;

interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
IdHTTP;

type
TForm1 = class(TForm)
Button1: TButton;
IdHTTP1: TIdHTTP;
procedure Button1Click(Sender: TObject);
private
procedure up;
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation
{$R *.dfm}
procedure TForm1.up;
var s:string;
begin

try
s:=idhttp1.Get( 'http://www.zhcw.com/data-js/nowdata98.js ');出错的地方
except
showmessage( '更新失败！ ');
end;

if s < > ' ' then
showmessage( '更新成功！ ');
end;

procedure TForm1.Button1Click(Sender: TObject);
var tid:dword;
begin

CreateThread(nil,0,@tform1.up,nil,0,Tid);
end;

end.

First chance exception at $7C812A5B. Exception class EAccessViolation with message 'Access violation at address 00482985 in module 'up.exe '. Read of address 00000364 '. Process up.exe (2320)

需要实现同步

居然会这样写代码的纯属SB

接受答案了.