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 FUNCTION SBSHADOW()

  Short:
  ------
  SBSHADOW() Draw a shadow around a box

  Returns:
  --------
  <aSaved> => an array containing the two saved screen
  sections

  Syntax:
  -------
  SBSHADOW(nTop,nLeft,nBottom,nRight,nShadowPos,nShadowAtt)

  Description:
  ------------
  Draws a shadow for box described in coordinates
  <nTop,nLeft,nBotton,nRight>

  The shadow is of color <nShadowAtt> and is at
  position <nShadowPos>, which is one of the following:

      LOWER LEFT    1
      LOWER RIGHT   3
      UPPER LEFT    7
      UPPER RIGHT   9

  Returns an array with the saved screens for each side
  of the shadow.

  This array can be passed to SBUNSHADOW() for
  restoring the previous screen.

  Examples:
  ---------
   Dispbox(10,10,20,20)
   aSaved := sbshadow(10,10,20,20,3,8)
              // draws a shadow in the lower right
              // of color gray on black
   sbunshadow(aSaved)         // restore old screen

  otes


  Source:
  -------
  S_BOXES.PRG