# Method MasterObject()->putenv()

Method putenv

  ``void` putenv(`string` `varname`, `void`|`string` `value`)`

Description

  Sets the environment variable `varname` to `value`.

  If `value` is omitted or zero, the environment variable `varname` is removed.

  `varname` and `value` cannot be wide strings nor contain `'\0'` characters. `varname` also cannot contain `'='` characters.

Note

  On NT the environment variable name is case insensitive.

See also

  getenv()