Structural Design Patterns in Modern C++ - Example of the Remote Proxy

The video tutorial introduces the concept of creating a base class using the Component Object Model (COM) and explains the importance of HRESULT for function return codes. It describes setting up an interface for animating images, specifically using characters, and implementing the Sprite class to handle these animations. The tutorial also covers error handling and the use of the Windows API Sleep function for animation delays. Finally, it discusses how to use the Sprite class in different processes through a remote proxy.

What is the primary purpose of the HRESULT return type in COM methods?

• To indicate the size of the function

• To specify the function's execution time

• To signify success or failure of the function

• To determine the function's memory usage

In the 'ianimate' interface, what are the two functions that clients must implement?

• initialize and execute

• setimage and draw

• setimage and animate

• draw and animate

What does the 'Sprite' class use to create a delay in the animation?

• A for loop

• The Pause function from Windows API

• The Sleep function from Windows API

• A while loop

What is the role of the 'draw' function in using the 'Sprite' class?

• To delete the Sprite class

• To compile the Sprite class

• To set an image and call the animate function

• To initialize the Sprite class

How can a client application use the 'Sprite' class if it resides in a different process?

• By using a local proxy

• By using a remote proxy

• By recompiling the class

• By copying the class to the client process