Определение типа устойства
	
procedure TForm1.Button1Click(Sender: TObject);
begin
  case GetDriveType('F:\') of
    0              : ShowMessage('The drive type cannot be determined');
    1              : ShowMessage('The root directory does not exist');
    DRIVE_REMOVABLE:ShowMessage('The disk can be removed');
    DRIVE_FIXED    : ShowMessage('The disk cannot be removed');
    DRIVE_REMOTE   : ShowMessage('The drive is remote (network) drive');
    DRIVE_CDROM    : ShowMessage('The drive is a CD-ROM drive');
    DRIVE_RAMDISK  : ShowMessage('The drive is a RAM disk');
    end;
end;