XBXX()

  Short:
  ------
  XBXX() Draws an exploding box on the screen of a given color

  Returns:
  --------
  Nothing

  Syntax:
  -------
  XBxx(nTop,nLeft,nBottom,nRight,[nColor],[nShadow];
                      [nShadowColor],[cFrame])

  Description:
  ------------
  <nTop >      - top row
  <nLeft>      - left col
  <nBottom>    - bottom row
  <nRight>     - right column
  [nColor]     - attribute to box default setcolor()
  [nShadow]    - numeric shadow type  (default 0)
                    follow numeric keypad
                        7 = upper left
                        1 = lower left
                        3 = lower right
                        9 = upper right
                        0 = no shadow

  [nShadowColor]   - shadow attribute (default 7 - grey on black)

  [cFrame ]    - frame string - MUST be 9 characters - default single line

  Examples:
  ---------
   XBXX(10,10,20,20,47,9,8)

  Notes:
  -------
  Previously a 'C' function, now Clipper 5.01.

  Source:
  -------
  S_XBXX.PRG