Aggregation and Class Factory Macros

These macros provide ways of controlling aggregation and of declaring class factories.

DECLARE_AGGREGATABLE	Declares that your object can be aggregated (the default).
DECLARE_CLASSFACTORY	Declares the class factory to be CComClassFactory, the ATL default class factory.
DECLARE_CLASSFACTORY_EX	Declares your class factory object to be the class factory.
DECLARE_CLASSFACTORY2	Declares CComClassFactory2 to be the class factory.
DECLARE_CLASSFACTORY_AUTO_THREAD	Declares CComClassFactoryAutoThread to be the class factory.
DECLARE_CLASSFACTORY_SINGLETON	Declares CComClassFactorySingleton to be the class factory.
DECLARE_GET_CONTROLLING_UNKNOWN	Declares a virtual GetControllingUnknown function.
DECLARE_NOT_AGGREGATABLE	Declares that your object cannot be aggregated.
DECLARE_ONLY_AGGREGATABLE	Declares that your object must be aggregated.
DECLARE_POLY_AGGREGATABLE	Checks the value of the outer unknown and declares your object aggregatable or not aggregatable, as appropriate.
DECLARE_PROTECT_FINAL_CONSTRUCT	Protects the outer object from deletion during construction of an inner object.
DECLARE_VIEW_STATUS	Specifies the VIEWSTATUS flags to the container.

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