SETLOCAL ENABLEDELAYEDEXPANSION causes CD and PUSHD to not persist

Question

I am trying to use setlocal enabledelayedexpansion and cd together in a batch script, which seems to not persist changes back to shell.

The

Answer 1

Saving a string in registry across endlocal. Tested on win7 cmd (skip=2, may differ with different versions of reg.exe)

:: What: stash string in registry from cmd line, across endlocal barrier
:: PS. I added %RANDOM% to Windows-NT and Win95 command.com and still using it.
@echo off

set key="HKCU\Volatile Environment"
set keyname=stash%RANDOM%
set keytype=REG_SZ

setlocal ENABLEDELAYEDEXPANSION

::== Save string
set data_stash=Hello-%DATE%-%TIME%
echo Saving=%data_stash% in key=%keyname%
reg add %key% /v %keyname% /t %keytype% /d "%data_stash%" /f

endlocal

::== Read string
echo reg query %key% /v %keyname%
for /f "tokens=2* skip=2" %%a in ('reg query %key% /v %keyname%') do (
  set data_unstashed=%%b
)
echo Read data_unstashed=%data_unstashed% 

::== Delete stash
reg delete %key%  /v %keyname% /f  

Edit Stephan another way to save variables beyond endlocal:

@echo off
set var1=hello
set var2=world
setlocal 
echo previous: %var1%, %var2%
set var1=HELLO
set var2=WORLD
echo inside:   %var1%, %var2%
endlocal & set "var1=%var1%" & set "var2=%var2%" 
echo after:    %var1%, %var2%

The trick is that due to the parsing the variables are expanded before endlocal is effective, but setted after that.
(sorry for hijacking your answer, but that's also too big for a comment)