Windows environment variables msdn

Constructing key and value using std::wstring str buffer, buflen , as suggested in this answer. I believe performance should be better than concating char-by-char, though I haven't measured it.

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Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. The name of the environment variable. The contents of the environment variable. The maximum size of a user-defined environment variable is 32, characters.

Provides information about, and means to manipulate, the current environment and platform. This class cannot be inherited. Use the Environment class to retrieve information such as command-line arguments, the exit code, environment variable settings, contents of the call stack, time since last system boot, and the version of the common language runtime. Gets a value that indicates whether the current application domain is being unloaded or the common language runtime CLR is shutting down.

Returns the path of the executable that started the currently executing process. Returns null when the path is not available. Gets a version consisting of the major, minor, build, and revision numbers of the common language runtime. Replaces the name of each environment variable embedded in the specified string with the string equivalent of the value of the variable, then returns the resulting string.

Immediately terminates a process after writing a message to the Windows Application event log, and then includes the message in error reporting to Microsoft. Immediately terminates a process after writing a message to the Windows Application event log, and then includes the message and exception information in error reporting to Microsoft.

Retrieves the value of an environment variable from the current process or from the Windows operating system registry key for the current user or local machine. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors.

For more information, see Conventions for Function Prototypes. Environment Variables. System Information Functions. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode.