SetESC

@echo off
rem --set ESC symbol to esc_char variable using the PROMPT
rem --by Vasil "npcomaka" Arnaudov
set prompt_backup=%prompt%
prompt $E
echo|set /p=^^^^>%temp%\prm.bat
setlocal enabledelayedexpansion
for /f "delims=" %%P in ('call %temp%\prm.bat 2^>nul') do (
    endlocal
    set esc_char=%%P
    rem echo %%P
    goto :end_for
)
:end_for
prompt %prompt_backup%
set "prompt_backup="
del %temp%\prm.bat /s /q >nul