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  Innovative Data Concepts, Inc.                  Technical Information Note
  TesSeRact Development Tools
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  Replacing Vsave() and Vrestore()
  TN-9204-001                                                 April 25, 1992
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 If you like to to save and restore the DOS screen automatically when your
 program starts up and exits, and having been doing so using Vsave(),
 Vclear(), and Vrestore(), TCXL 6 has a new way to do it. The new method is
 easier, safer, and highly recommended. Just follow these guidelines:

  .  As soon as you open any window at all in your program, TCXL will
     automatically save the underlying screen.

  .  To clear the opening screen with an attribute, use the statement
     WopenFull(Atr), where Atr is the attribute with which you would like to
     clear the screen. For example:

     WopenFull(WHITE | _BLUE);

     Hint: You can always use WsetFil() first to change the fill character, if
     you want the "desktop" look.

  .  If you want to simply save the screen, either because you will not be
     opening any TCXL windows in your program, or in preparation for a call to
     a non-TCXL application with spawn(), use WsaveFull().

  .  Always end your program with the statement WcloseAll(). This will close
     all open windows and restore the original screen.

 The V...() functions are generally unnecessary, especially since the
 windowing system does so much for you. In fact, we recommend that you simply
 don't use these functions at all.