# File lib/vendor/windows/lib/rb-fchange/notifier.rb, line 44
    def add_watcher(watcher)

      @watchers[watcher.id] = watcher

      @dwChangeHandles.push watcher.id

      # Pack event handles into newly created storage area 
      # to be used for Win32 call
      @lp_dwChangeHandles = dwChangeHandles.pack("L" * dwChangeHandles.count)

    end