Updating a system environment variable from C ++

Question

I am currently writing an unmanaged C ++ program that works with a system environment variable. I get the value using GetEnvironmentVariable (...). Now I have a C # program that can change this variable at any time, for example. eg:

Environment.SetEnvironmentVariable("CalledPath", System.Windows.Forms.Application.ExecutablePath, EnvironmentVariableTarget.Machine);

The problem is that the C ++ program does not update this variable (or its environment block as a whole) automatically, so I still work with the old value unless I restart the program, which is not very good. Is there a way to update the environment block or, preferably, another way to read system environment variables?

Thanks in advance, Russo

Answer 1

, , , , . , GetEnvironmentVariable, , .

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment

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Answer 2

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Answer 3

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Answer 4

, , , . . MSDN EnvironmentVariableTarget.

EnvironmentVariableTarget.Machine, , , , :

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment Windows .

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Answer 5

putenv() - C-runtime ( MS _putenv() _putenv_s() - ++ .

getenv() .

Answer 6

, _putenv() Windows.