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 VIDEO() 

          The VIDEO function has the ability to disable or enable the video
          signal to the current video controller.  This has the effect of
          "blanking" a monitor during idle times which will prevent monitor
          burn.  Current supported monitor types are monochrome (MONO), color
          (CGA), enhanced (EGA) and video graphics array (VGA).


      Format: 

               video('on' | 'off')


      Parameters: 

               'on'......Character string variable or constant, non case
                         sensitive, instructing  the function to enable the
                         video signal on the video controller.  Uses the last
                         BIOS saved screen mode to enable the video signal
                         through a direct command to the video controller.
                         The screen will restore to the current contents of
                         the video memory instantaneously.

               'off'.....Character string variable or constant, non case
                         sensitive, instructing the function to disable the
                         video signal on the video controller.  Uses the last
                         BIOS saved screen mode, modified with proper bit
                         settings, to disable the video signal through a
                         direct command to the video controller.  None of the
                         information is lost from the screen as the screen is
                         simply "turned off", not erased.


      Examples: 

               1.   Turn off the video controller video drive signal after
                    waiting sixty (60) seconds for some keystroke.

                    .
                    .
                    .
                    inkey(60)
                    video('off')
                    .
                    .
                    .

               2.   Turn on the video controller drive signal.

                    .
                    .
                    .
                    video('on')
                    .
                    .
                    .


      Returns: 

               Nothing.


      Cautions: 

               None.