This class derives from the MSPluginClass which in turn derives from the MAXClass. Custom Attributes are instances of this class.
Read-only Boolean property. Always returns true since Custom Attributes use ParamBlock2. This property is also available in MAXClass and MSPluginClass.
Read-only property of custom attribute definition. Also available in MAXClass, and MSPluginClass. SinceMSPluginClass derives from MAXClass, and MSCustAttribDef derives from MSPluginClass, the property always returns true for custom attribute definitions.
Aread-only property, always true for custom attribute definitions. Also available in MAXClass and MSPluginClass.