Visual Studio 2022 setup and corresponding function

Question

1.            At the bottom of the workloads, no MFC could be selected, is it right?

2.            What is the corresponding function of the button "open" in the red frame in below picture2? which class of the function?

Answer 1

You can select MFC in Individual Components tab

When you choose to create a C++ MFC project, a wizard will appear that will automatically create a window with file select button implemented by selecting "Use a menu bar and toolbar" in the wizard.

The classes for the button are CMFCToolBar and CMFCToolBarButton.