In MFC programming, when switching between the minimum and display of the application interface, the GDI object is added

Recently I was readingCodeAnd found an interesting phenomenon.

 

 

Seticon (m_hicon, false) is modified to seticon (m_hicon, true). When the build is successful and executed, it is found thatProgramI am puzzled by the leakage of the GDI object during interface switching.

 

 

Check the seticon:

 

Seticon (m_hicon, false); // set small icon

When the program is displayed, the defined icon is displayed in the upper left corner, and the generated exe program displays the icon.

Seticon (m_hicon, true); // set big icon

If you use Alt + TAB when running the program, the defined icon is displayed.