怎样用批处理文件修改注册表？

::1.
@echo
off
<
"%~f0"
more
+5
>
tmp.reg
regedit
/s
tmp.reg
del
tmp.reg
goto
:eof
reg文件代码写在文件末尾
::2.
通过reg.exe来修改注册表,详见reg
/?

@echo off

::删除"MSLicensing]"项及其下所有子项和键值
reg delete HKLM\SOFTWARE\Microsoft\MSLicensing /f
::新建"MSLicensing"项
reg add HKLM\SOFTWARE\Microsoft\MSLicensing

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C:\WINDOWS>reg /?

Console Registry Tool for Windows - version 3.0
Copyright (C) Microsoft Corp. 1981-2001. All rights reserved

REG Operation [Parameter List]

Operation [ QUERY | ADD | DELETE | COPY |
SAVE | LOAD | UNLOAD | RESTORE |
COMPARE | EXPORT | IMPORT ]

Return Code: (Except of REG COMPARE)

0 - Succussful
1 - Failed

For help on a specific operation type:

REG Operation /?

Examples:

REG QUERY /?
REG ADD /?
REG DELETE /?
REG COPY /?
REG SAVE /?
REG RESTORE /?
REG LOAD /?
REG UNLOAD /?
REG COMPARE /?
REG EXPORT /?
REG IMPORT /?

C:\WINDOWS>

@echo
off
@reg
delete
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\Userinit
/v
sang
/v后面是键名
@reg
add
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\Userinit
/v
sang
/d
....
/d
后面是键值

@echo off
reg delete [hkey_local_machine\software\microsoft\mslicensing] /va /f