[texhax] texlive portable

[Germain BOYER]

Bonjour ,  

On internet i find :  
to use texworks (or texmaker, winshell, etc..) with texlive portable i need to change the file tl-portable.bat like this :  
replace the line :  
"%ComSpec%" /k "title TL-SHELL& prompt TL %prompt%"  
by the lines :  
REM "%ComSpec%" /k "title TL-SHELL& prompt TL %prompt%"  
start "" "%~dp0TeXworks\TeXworks.exe"  

i do and it's works well.  
i also test the line : 
start %~dp0TeXworks\TeXworks.exe  

and it's works to.  

what's the difference between the line :  
start "" "%~dp0TeXworks\TeXworks.exe"  
and the line  
start %~dp0TeXworks\TeXworks.exe ?  

what's better : the first line or the second line ?  
    
thanks for your answers and sorry for my bad english. 
   
germain.boyer at ac-toulouse.fr 20-01-2010