This is a read-only property that return an integer indicating the first page that contains the largest portion of its visible area in the control. The value returned is 1-based. If there are no pages in the control (i.e. PageCount returns 0, -1 will be returned.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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