The SETENV procedure adds or changes an environment string in the process environment.
            Examples
            Change the current shell variable by entering:
            SETENV,'SHELL=/bin/sh'
            Make sure to eliminate any whitespace around the equal sign:
            
            
            SETENV, 'VAR = H:\FLOOB'
             
            
            SETENV, 'VAR=H:\FLOOB'
            Syntax
            SETENV, Environment_Expression
            Arguments
            Environment_Expression
            A scalar string or string array containing one or more environment expressions to be added to the environment.
            Keywords
            None.
            Version History
            
            See Also
            GETENV