How to Save file as .bat or Autorun.inf

Some persons dont know how to make .bat or inf file through text document.
Now this is very small tutorial,

1st you need any kind of code For Example:
now create a simple text document in your desktop and copy the red text code and paste it into text document,


[autorun]
open=launch.bat
ACTION= Perform a Virus Scan

now go to file and click on save as and save it as autorun.inf if you want make .bat file then save it as anyname.bat if you want save it as exe then anyname.exe