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putenv

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The Microsoft-implemented POSIX function name putenv is a deprecated alias for the _putenv function. By default, it generates Compiler warning (level 3) C4996. The name is deprecated because it doesn't follow the Standard C rules for implementation-specific names. However, the function is still supported.

We recommend you use _putenv or security-enhanced _putenv_s function instead. Or, you can continue to use this function name, and disable the warning. For more information, see Turn off the warning and POSIX function names.

Important

This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported in Universal Windows Platform apps.