c++ - 有没有办法在 Windows 上的 C++ 中以编程方式设置环境路径？

Question

有没有办法以编程方式(C++)设置全局windows路径环境变量？

据我所知，putenv 只为当前应用程序设置它。
直接在注册表中更改 (HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment) 也是一种选择，但如果有的话我更喜欢 API 方法？

Answer 1

MSDN Says :

Calling SetEnvironmentVariable has no effect on the system environment variables. To programmatically add or modify system environment variables, add them to the HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment registry key, then broadcast a WM_SETTINGCHANGE message with lParam set to the string "Environment". This allows applications, such as the shell, to pick up your updates. Note that the values of the environment variables listed in this key are limited to 1024 characters.