[RESOLVED] question about dll injection

hello:
i just do a dll injection test, my code works fine when the dll is injected into the explorer.exe,
or other application processes.
but i try to inject it into the system processes,like lsass.exe,winlogon.exe,smss.exe...............
it failed. i use the code from a book called "Windows via c/c++" ---by Richter

do you have any ideas why it doesn't work in the system processes?

have a nice day!

The system processes are running under the "SYSTEM" user account.

You do not have permission to tamper with these...