Exception when switching to empty drives

I have written a code in C++ builder in which I use header FileCtrl.hpp and I call SelectDirectory procedure so that the user can choose the a directory. When I change the drive to empty floppy disk or DVD drives, I get Exception EInOutError. I used try catch, bu it didn't work.

try{
   SelectDirectory(path, TSelectDirOpts(), 0);
}catch (EInOutError &exception)
{
   Application->ShowException(&exception);
}

Then I looked at the procedure in FileCtrl.pas responsible for drive change and I modified it but again nothing changed, I still get the exception.What Should I do?

procedure TDirectoryListBox.DriveChange(NewDrive: Char);
begin
  if (UpCase(NewDrive) <> UpCase(Drive)) then
  begin
  if NewDrive <> #0 then
    begin
        {$I-}
       ChDir(NewDrive + ':');
      if IOResult<>0 then
      begin
        {$I+}
        MessageDlg('Warning', mtWarning, [mbOk], 0);
        Exit;
      end;
      {$I+}
      GetDir(0, FDirectory);
    end;
    if not FInSetDir then
    begin
      BuildList;
      Change;
    end;
  end;
end;

Tags: C++, Pascal, Builder, IO, Exceptions