Set date/time of the file

procedure TForm1.Button1Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
    Edit1.Text:=OpenDialog1.FileName;
end;


procedure TForm1.Button2Click(Sender: TObject);
var
  HFile: Word;
  MyDate: TDateTime;
  MyDate2: Integer;
begin
  HFile:=FileOpen(Edit1.Text, fmOpenWrite);
  MyDate:=StrToDateTime(Edit2.Text);
  MyDate2:=DateTimeToFileDate(MyDate);
  FileSetDate(HFile, MyDate2);
  FileClose(HFile);
end;