Basic concepts of COM

1. Active X (formerly known as ole control) is developed based on COM

2. The directui interface library can be viewed as a mini Microsoft WPF, Mozilla XUL, or Adobe Flex

4. ASP. NET

5. C #

6. com Development Method

6.1 use comsdk to directly develop COM components

6.2 implemented through the com support provided by MFC

6.3 development through ATL (Active Template Library)

 

Cocreateinstance-> cogetclassobject-> dllgetclassobject

 

Conclusion of C ++ multi-inheritance:

1. If there are two identical unimplemented functions in the parent class, after the child class implements the function, the two identical functions will point to the implementation of the Child class.