Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  Include:   <stdlib.h>
 
  Syntax:    int putenv( char *envstring );
 
  Returns:   0 if successful, or -1 if not.
 
  See also:  getenv
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