【C++ Builder CE】インターネットから DL したファイルを開こうとすると出る警告を消す

//---------------------------------------------------------------------------

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE で管理されるコンポーネント
	TMemo *Memo1;
private:	// ユーザー宣言
public:		// ユーザー宣言
	__fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop
#include <IOUtils.hpp>

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
String ZI_FILENAME = "Zone.Identifier";

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{

	String Path = "./";

	String SearchPattern = "*.*";

	TSearchOption Option = TSearchOption::soTopDirectoryOnly;

	TStringDynArray files = TDirectory::GetFiles(Path, SearchPattern, Option);

	for (int i = 0; i < files.Length; ++i){
		Memo1->Lines->Add(files[i]);
		String FSFileName = files[i] + ":" + ZI_FILENAME;
		if( TFile::Exists(FSFileName) ){
			DeleteFile(FSFileName);
			Memo1->Lines->Add("stripped " + FSFileName);
		}

	}
}