mkmemkey

mkmemkey.exe

creates a volatile Windows registry key (only exists in memory, doesn't persist a Windows reboot).

usage

mkmemkey [HKLM|HKCU|HKCR|HKU|HKCC]\[KeyName]

exit codes:

• 0 = success
• 1 = error
• 2 = key already existed, no changes made

example

REM # create the memkey
$ mkmemkey "HKCU\SOFTWARE\MyNewKey"

REM # and optionally also add values to it (using usual registry tools like regedit.exe or reg.exe)
$ reg add "HKCU\SOFTWARE\MyNewKey" /v "foo" /d "bar" /t REG_SZ

REM # query it
$ reg query "HKCU\SOFTWARE\MyNewKey"
HKEY_CURRENT_USER\SOFTWARE\MyNewKey:
foo    REG_SZ    bar

REM # and when we query after a reboot, it's all gone
$ reg query "HKCU\SOFTWARE\MyNewKey"
ERROR: The system was unable to find the specified registry key or value.

compatibility

Any app (i.e. regedit.exe, reg.exe, etc) should be able to create Registry Values under a memkey and also delete memkeys. However, most apps can not create Subkeys below a memkey (as such subkeys need to be created as volatile keys, too). Instead, memkey.exe can be used to create volatile Subkeys.