content: 'BookmarksHandler interface functions'
  Sub SaveBookmark()
      content = m.top.content
      position = m.top.position
      BookmarksHelper_SetBookmarkData(content.id, position)
  End Sub
  
  Function GetBookmark() as Integer
      content = m.top.content
      return BookmarksHelper_GetBookmarkData(content.id)
  End Function
  
  Sub RemoveBookmark()
      content = m.top.content
      BookmarksHelper_DeleteBookmark(content.id)
  End Sub
  