Keep variable after endlocal in Batch - windows

Question

I have a folder structure, which is like for example C:\Temp\ and there are a lot of folder and file, and within each folder there are a "callme.bat". I would like to create a so called main.bat which is one after another call the callme files within the main' window. But there is a problem, within the callme files are some echo which contains "!" mark what make a problem for me.
I realized the problem with the setlocal-endlocal combo, because the batch scrip wants to interpret the message within the "!" marks, so I must use endlocal, but if I did I not able to run the callme bats.
callme.bat
#echo off
echo !!! hidden message !!! not hidden message
pause
main.bat variant 1
#echo off
setlocal enabledelayedexpansion
set PATH=C:\Temp
for /F %%x in ('dir /B/A:D %PATH%') do (
set CURR_DIR=%PATH%\%%x
set ACTUAL_BATCH=!CURR_DIR!\callme.bat
echo !ACTUAL_BATCH!
call !ACTUAL_BATCH!
pause
)
pause
exit
main.bat variant 2
#echo off
set PATH=C:\Temp
for /F %%x in ('dir /B/A:D %PATH%') do (
setlocal enabledelayedexpansion
set CURR_DIR=%PATH%\%%x
set ACTUAL_BATCH=!CURR_DIR!\callme.bat
echo !ACTUAL_BATCH!
ENDLOCAL & SET VAR=!ACTUAL_BATCH!
echo %VAR%
pause
)
pause
exit
main.bat variant 3
#echo off
set PATH=C:\Temp
for /F %%x in ('dir /B/A:D %PATH%') do (
setlocal enabledelayedexpansion
set CURR_DIR=%PATH%\%%x
set ACTUAL_BATCH=!CURR_DIR!\callme.bat
echo !ACTUAL_BATCH!
REM source: https://stackoverflow.com/questions/3262287/make-an-environment-variable-survive-endlocal
for /f "delims=" %%A in (""!ACTUAL_BATCH!"") do endlocal & set "VAR=%%~A"
echo %VAR%
call %VAR%
pause
)
pause
exit
So I don't know what to do. Anyone has an idea?
variant 1's output:
C:\Temp\1\callme.bat
not hidden message
C:\Temp\2\callme.bat
not hidden message
variant 2-3's output:
C:\Temp\1\callme.bat
ECHO is off.
C:\Temp\2\callme.bat
ECHO is off.

Answer 1

TL;DR
ENDLOCAL&set "varname=%sourcevarname%"
probably, where varname is the variablename to set and sourcevarname is the variable whose value is to be assigned to varname - and they CAN be the same name, even if the statement appears logically null - it's exporting the variable from within the setlocal/endlocal block.
Key point: MUST be on one physical line and may be repeated if necessary (ie
ENDLOCAL&set "varname=%sourcevarname%"&set "varname2=%sourcevarname2%"
So
ENDLOCAL&set "fred=%fred%"&set "bill=%george%"
is perfectly valid, to set the value of fred outside the setlocal/endlocal bracket to its final value inside and of billoutside to the final value of george inside.

Answer 2

Some points about your code:
Never use PATH as a variable name, as it destroys the PATH variable for searching executable files.
Use the extended SET syntax set "varname=content" to avoid problems with trainling spaces.
You only need to disable the delayed expansion mode by using setlocal DisableDelayedExpansion
#echo off
setlocal EnableDelayedExpansion
set MY_PATH=C:\Temp
for /F %%x in ('dir /B/A:D %PATH%') do (
set "CURR_DIR=%MY_PATH%\%%x"
set "ACTUAL_BATCH=!CURR_DIR!\callme.bat"
call :execute ACTUAL_BATCH
pause
)
pause
exit /b
:execute ACTUAL_BATCH
set "batFile=!%~1!"
echo Calling !batFile!
setlocal DisableDelayedExpansion
call %batFile%
endlocal
exit /b