Sets or gets a boolean value that determines if nodes can be expanded or collapsed by clicking on them with the mouse. By default this property is set to false and expand/collapse occurs only by clicking on the expand/collapse images next to the node.
Target Platforms: Windows 10, Windows 8.1, Windows 8, 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
