Essential COM

2017-07-07 02:10:07

4.

class object { public: template <class T> virtual T * dynamic_cast(const type_info& t = typeid(T) ) }; , 1995

2 IUnknown . , . , , . QueryInterface ( ) ++- dynamic_cast, .

, QueryInterface , , this , . , , C++ dynamic_cast.

QueryInterface , IUnknown , . , , .

Unknown

QueryInterface

QueryInterface IUnknown