Reg file to change a specific bit in a specific key

@echo off
setlocal enabledelayedexpansion
set RegKey=HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
set RegVal=DefaultConnectionSettings
echo Reading current settings ...
for /f "tokens=2*" %%a in ('reg.exe query "%RegKey%" /v "%RegVal%" ^| find /i "%RegVal%"') do (set RegData=%%~b)
set /a ByteCount = 0
:StringToByteArrayLoop
	set /a ByteCount += 1
	set Byte[!ByteCount!]=!RegData:~0,2!
	set RegData=!RegData:~2!
if not "!RegData!"=="" (goto :StringToByteArrayLoop)
echo ... found %ByteCount% entries.
for /f "tokens=1 delims=[]" %%a in ('type "%~f0" ^| find /n "[REPLACE]"') do set DataStart=%%a
for /f "skip=%DataStart% tokens=1* delims== " %%i in ('type "%~f0"') do (
	if %%i gtr %ByteCount% (
		echo Replacement index %%i is outside of the length of the current data ^(%ByteCount%^).
		echo Operation cancelled.
		goto :eof
	)
	set NewValue=0%%j
	set NewValue=!NewValue:~-2!
	echo Byte[%%i]: !Byte[%%i]! --^> !NewValue!
	set Byte[%%i]=%%j
)
echo Writing settings back to registry ...
set RegData=
for /l %%i in (1, 1, %ByteCount%) do (set RegData=!RegData!!Byte[%%i]!)
ECHO reg.exe add "%RegKey%" /v "%RegVal%" /t REG_BINARY /d "%RegData%" /f
echo Done.

goto :eof
REM In the following section, enter the bytes to be replaced in the format <Index>=<NewValue>;
REM Index is one-based, not zero-based!
REM NewValue is the new hex value without leading "0x".
REM Leading zeros for the index are not allowed; for the value, leading zeros can be added, but are not required.
REM Example: 9=5 or 12=0C
[REPLACE]
9=05

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