


                                   CHGENV.EXE
                            A DOS ENVIRONMENT EDITOR

                                       BY
                                 PETER A. HYMAN
                                 (609) 799- 2638


     DESCRIPTION:

     CHGENV (Change Environment) is a program designed to allow the user  to
     easily change settings in the Environment.   With CHGENV,  the user may
     add to, delete from or modify any of the SETtings currently in effect.
     CHGENV  is particularly useful when a long environment  variable  (e.g.
     PATH) requires modification.   The user need not retype the entire  SET
     command with CHGENV, merely edit the setting.

     USAGE:

     CHGENV has no command line arguments, simply type CHGENV [ENTER].

     CHGENV displays a copyright message followed by the location in  memory
     of  the MASTER copy of the Environment,  its Maximum  allowable  length
     followed  by the current length of all the environment strings in  use. 
     The Maximum length may not be exceeded.

     Next,  CHGENV will display all currently SET environment  variables  in
     ALPHABETICAL order.   If more than 16 variables are set,  a scroll  bar
     will be displayed in the left margin.

     There are only three operations which CHGENV performs,  and three  keys
     used to perform them:

     INSERT KEY:    Add a New Environment Variable
     DELETE KEY:    Delete Currently Selected Environment Variable
     ALT-C KEY:     Change Currently Selected Environment Variable

     Pressing Control-Break,  Control-C or ESCAPE immediately ends the  pro-
     gram.  Pressing F10 ends the session prompting the user if he wishes to
     save the changes.  Even if no edits have been made, the environment has
     been sorted and the Save Changes prompt will always appear.

     A highlighter is always visible.   It indicates the  currently-selected
     Environment Variable.   To move the highlighter, the UP or DOWN Cursor,
     HOME or END or RETURN Keys may be used to move about the screen.





















                                   CHGENV.EXE
                            A DOS ENVIRONMENT EDITOR

                                       BY
                                 PETER A. HYMAN
                                 (609) 799- 2638


     ADDING A NEW ENVIRONMENT VARIABLE:

     All Environment Variables may be a maximum of 128 characters or the re-
     maining  available environment space,  whichever is less.   The  syntax
     must be:

     name=value

     where name is the name of the Environment Variable (e.g.  PROMPT),  the
     equal  sign  is mandatory with or without a space in between,  and  the
     value is the text or numeric value to be associated with the  Variable. 
     CHGENV will display a line near the bottom of the screen when INSERT is
     pressed and prompt Add: , followed by a highlighted area.  If the Envi-
     ronment  Variable is more than the screen width,  the  characters  will
     scroll  until done.   Any edit may be completed by pressing the  UP  or
     DOWN cursor,  HOME or END keys or RETURN.   If the Environment Variable
     to  be  added does not contain an equal sign,  or if its  length  would
     cause  the  total Environment Length to exceed its maximum,  and  error
     will be reported.

     If  the Environment Variable to be added is the same as one already  in
     the Environment,  it will replace the existing one (although the CHANGE
     option could also be used to edit the existing Environment Variable).

     Once editing is completed, the newly-added Environment Variable will be
     sorted into the display.

     DELETING AN ENVIRONMENT VARIABLE:

     The currently highlighted Environment Variable may be deleted by press-
     ing the DELETE Key.  When this is done, the variable to be deleted will
     flash and a prompt Delete This Environment String?  will be  displayed. 
     A 'Y' or 'N' in upper or lower case must be entered in response to this
     prompt.   If 'Y'  is entered, the Environment String is deleted and the
     list resorted and the Current Environment Length is recomputed.

     CHANGING AN EXISTING ENVIRONMENT VARIABLE:

     The currently highlighted Environment Variable may be changed by press-
     ing  ALT-C.   When this is done,  an edit box is displayed just to  the
     right of the equal sign and the cursor will be positioned at the end of
     the string OR at the right border of the screen if the string is longer
     than the width of the screen.   To scroll the string,  use the right or
     left cursor keys.  To delete characters, either the DELETE or BACKSPACE
     Keys  may be used.   Only overtype mode is supported.  Any edit may  be
     completed  by pressing the UP or DOWN cursor,  HOME or END keys or  RE-
     TURN.











                                   CHGENV.EXE
                            A DOS ENVIRONMENT EDITOR

                                       BY
                                 PETER A. HYMAN
                                 (609) 799- 2638


     SAVING THE CHANGES:

     After all Environment Changes have been completed,  F10 may be  pressed
     to  save the changes.   Replying 'Y' to the Save Changes?  prompt  will
     cause the modified environment to be copied back into the Master  Envi-
     ronment Location.   This is the copy of the environment which is  given
     to  each process or subprocess.   Any TSRs already loaded have  already
     inherited  their  environments and cannot be affected by  this  change. 
     However,  all new commands,  programs or new invocations of  a  command
     processor will inherit the modified environment.

     DISCLAIMER:

     Every  effort has been made to test this program and assure its  integ-
     rity.   If it does not work on your system,  please let me know immedi-
     ately.

     This program is being placed in the public domain as shareware.  Please
     distribute  it freely to other BBSs or users.   You should include  the 
     files CHGENV.EXE and CHGENV.TXT.    You may not charge a  fee  for  the
     product or resell it in combination with any other product without per-
     mission.

     If you like CHGENV.EXE and find it helpful,  please register your  sup-
     port by remitting a $10 registration fee.   Include your name,  address
     and phone to:

     PETER A. HYMAN, INC.
     148 Tennyson Drive
     Plainsboro, NJ  08536

     Registered  users  will receive updates to the product for  the  coming
     year.






















