Function:   GetHandles()

               This function,  that can ONLY be  used on machines
               running under DOS 3.3 (or higher), can  be used to
               inspect the Number of open files
               Make sure you're running under DOS 3.3+ !

   Syntax:     GetHandles() --> nUsedHandles

   Arguments:  None.

   Returns:    The number of Handles currently used. DOS always
               uses 5 of them, every open file uses another. This includes
               Every file, even Overlay files, Index files etc....

   Usage:      ? 'Max # open files...:' + Str( MaxHandles() )
               ? '# of open files....:' + Str( GetHandles() )