Gets or sets the position where pages begin to turn when dropped. If the value is 0.0, the default, pages only turns if dropped over the opposite page. Positive values are understood of a proportion of the page width that still trigger a page turn. If value is 0.1, dropping a left page 10 percent to the left of the center of the book still turns the page.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2