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SET_AREA()                                      T_EXAM06, T_EXAM07, T_EXAM12
   Allows a graph to display on a portion of the screen.

   Syntax
         SET_AREA(nX1,nY1,nX2,nY2)

   Arguments
         nX1,nY1     Sets the upper left position.
         nX2,nY2     Sets the lower right position.

   Returns
         SET_AREA(@nX1,@nY1,@nX2,@nY2) Current settings are returned.

   Description
         SET_AREA() allows a graph to display on a portion of the screen
         so two or more graphs may be displayed at the same time. nX1 and nY1
         set the upper left corner of the area on the screen. nX2 and nY2 set
         the lower right corner of the area on the screen. The screen is
         defined as a 100 by 100 matrix with the upper left corner as (0,0)
         and the lower right as (100,100). If you pass the variables by
         reference, then the current setting will be returned in those
         variables.