Display a box containing a bar area
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 Syntax

        GT_BarBox( nTop , nLeft , cTitle )

 Arguments:

      nTop   - Top row of box
      nLeft  - Left column of box (-1 to centre)
      cTitle - Title of box

 Returns:

      NIL

 Description:

      Similar to GT_BarInit(), but doesn't clear the screen.  This function
      displays a shadowed box containing the bar area, with the title
      written over the top left side of the box

 Examples:



 Header File: GT_LIB.CH

 Source: BARBOX.PRG

 Author:  Martin Colloby