Registry question

hi there!
i'm just wondering is it possible to write a function in C that will create a System Variable with its corresponding value (without causing for a system restart)?
regards,
jaro

That function already exists...

try typing 'SET' or 'SET /?' in a cmd prompt

To summarise: type 'SET variable=value' will set system variable 'variable' to value 'value'.

You can do this from C with the 'system()' function.

thanks Itsacon,

I did try what you said, but when i try to check the system variable that i've made (using the cmd window) i did'nt see it. i've check it using the Computer icon. sorry for my english

regards,
jaro

An environment variable is not the same as a system variable. Usually (I used these more on *nix machines than windows) environment variables only live as long as *drumroll* your process(/shell) environment.. On linux you can EXPORT (bash) your env variable, although after a reboot they will be gone again. Am not sure how to do it on windows, sorry.

I believe SET just sets an environment variable.

If you are using the environment of VC++, then in Visual Studio there are many funcitions starting with WriteRegKeyXXXX for changing registry values. In Visual Studio environment you can use C code to affect registry variables without restarting.

For Kernal Level variables it is however important to reboot your system as changes won't be seen unless restarted.

thanks Itsacon and Cirus.
it help me make sense on what I'm currently working on..