Now my question is how do alt +255 works there ?
What kind of function it actually is ?
Just thought sharing this.. All the keyboard key are having an equivalent value of ASCII. (For example how a computer will identify letter O and number 0? Just because they are converted to respected unique ascii values)
you can't rename anything using a null/blank value using direct key board input but using ascii value you can. Computer will listen to direct ASCII commands rather using just keyboard.. Alt+255 is the direct command/input to the computer to use ASCII equivalent that is the equivalent value of blank Non-breaking space or no-break space).
With Alt key you can use most of the symbols that you cant use using normal way..
and also regarding con file I got an email from my old archive and thought sharing it with you..
Hope this helps.. Good luck..