@Echo Off
:: Create a file containing only the null character (ASCII 0x00)
:: Authors: carlos, aGerman, penpen (from DosTips.com)
Cmd /U /C Set /P "=a" <Nul > nul.txt
Copy /Y nul.txt+Nul nul.txt >Nul
Type nul.txt |(Pause>Nul &Findstr "^") > wnul.tmp
Copy /Y wnul.tmp /A nul.txt /B >Nul
Del wnul.tmp