Parameters
- newIndex
- Indicates the new index of the selected tab page.
- canCancel
- Indicates whether the change of the selected index can be cancelled by the event handler.
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