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1. When developing an MFC application, under what circumstances might you need to call the Win32 API directly?
2. What services are provided by the CObject class?
3. Why would you use an MFC extension DLL?
4. Which member function of which MFC class implements the application message loop?
5. What type of classes can implement message maps?
6. Name four categories of Windows messages that can be handled by message maps.
7. What is the function of a document template object?
8. Which MFC class encapsulates GDI drawing functions?
9. How do you ensure that the client area of your application's main window always displays an up-to-date picture of the application data?

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