BigString()

         Displays a big banner with a specified string

    Syntax:

         BigString( nRow, nCol, cString, cColor ) -> Nil

         nRow    : Row of banner
         nCol    : Col of banner
         cString : The string to display
         cColor  : The color

    Description:

         Creates and displays and banner with a specified string. This function
         uses BigLetter() to create the banner.

    Return:

         Nothing.

    Example:

         BigString( 1, 10, "Hello", "GR+/B" )