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ABS_TO_Y()                                                          G_EXAM08
   Returns the Y value of the logical pixel position on the screen.

   Syntax
         nN = ABS_TO_Y(nPixel,nType)

   Arguments
         nType       Sets the type of coordinate system.
                     0 - World coordinate system.
                     1 - Axis scale coordinates.
                     2 - Screen coordinate upper-left (0,0) to Lower-right
                         (100,100).
         nPixel      Sets the absolute pixel position.

   Returns
         nN          Returns the value of the logical pixel position on the
                     screen.

   Description
         ABS_TO_Y() returns the world coordinate value, Y axis value, or
         screen coordinate value of the logical pixel position on the
         screen. nType determines what value will be returned.

         Type 0: the screen location based on the world coordinates. The
         default world values for the upper left corner are 0,0. The lower
         right corner of the screen is 100,100.

         Type 1: the relative position on the graph based on the X,Y
         scale position. If the Y-axis scale was from 0 to 10 units, then
         ATY(5,1) would return a physical pixel location on the Y scale at
         Y equal to 5.

         Type 2: the position based on coordinates (0,0) for upper left and
         (100,100) for lower right for the entire screen.