[일반/컴포넌트] 파일의 변경/생성/사용한 날짜 바꾸기

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    OpenDialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
{$R *.DFM}

procedure SetModifyDate(fName, fDate: string);
var
  Age, FHandle: integer;
  LocalFileTime, FileTime: TFileTime;
  FileBuf: File;
begin
  if FileExists(fName) then
  begin
    AssignFile(FileBuf, fName);
    Reset(FileBuf);
    try
      Age := DateTimeToFileDate(StrToDateTime(fDate));
      FHandle := TFileRec(FileBuf).Handle;
      DosDateTimeToFileTime(LongRec(Age).Hi, LongRec(Age).Lo, LocalFileTime);
      LocalFileTimeToFileTime(LocalFileTime, FileTime);

      // 변경한 날짜
      SetFileTime(FHandle, nil, nil, @FileTime);
      // 작성한 날짜
      SetFileTime(FHandle, @FileTime, nil, nil);
      // 사용한 날짜
      SetFileTime(FHandle, nil, @FileTime, nil);
    finally
      CloseFile(FileBuf);
    end;
  end
  else
    MessageDlg('파일이 존재하지 않습니다: ' + fName, mtError, [mbOK], 0);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
    SetModifyDate(OpenDialog1.FileName, '1999-12-25 오후 02:49:23');
end;

end.