BATCH

Comments
Use labels for comments, as REM is an actual command and may impede performance. A double colon can signify a comment to avoid confusion with actual labels: :: This is a comment REM This is a comment that requires executing a command

Starting Program from BAT File Without Terminal Window
@start /b \path\to\program argument

Starting BAT Files
Without allowing the BAT file to change the environment or current dir: cmd /c something.bat Quietly: nircmd exec hide something.bat

Built-in Variables
%~dp0  full path of dir containing bat file

Dispatch BAT Arguments
someprogram.exe %1 %2 %3 %4 %5 %6 %7 %8 %9 (so stupid)

Multiple Commands Per Line
Execute two commands, regardless of errors: echo awe & echo some Execute first command, and second command if no error: dir \somewhere >nil 2>&1 && echo \somewhere exists Execute first command, and second command if error: dir \somewhere >nil 2>&1 || echo An error occurred

Redirection
Redirect output to hell

C:\>echo svin >nul

Variables
set VARIABLE=value echo %VARIABLE%