Developers are strongly urged to assign a unique Key value to any Toolbar items they need to retrieve from the Toolbar item collections (Items and Buttons).
Key values should be unique across an UltraWebToolbar element; it's not necessary that they possess uniqueness across a web form (because all searches are scoped within a single UltraWebToolbar element, at any given time).
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