This interface supports two features:
This interface is implemented by UltraWebToolbar to support the creation, design-time and serialization support of button subclasses. It should not be necessary for application objects to implement this interface.
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