WM_CLOSE (Section 31)

 

참고> blog.naver.com/tipsware/221124184150

 

1. 'X' 버튼이 눌러지면 제일 먼저 WM_CLOSE 메시지가 프로그램으로 전송됨.
-> 이 메시지를 DefWindowProc 함수로 전달하지 않으면 윈도우가 종료되는 것을 막을 수 있음.

2. WM_CLOSE 와 WM_DESTROY
-> WM_CLOSE: 사용자의 선택에 따라서 윈도우의 종료를 막을 수 있음.
-> WM_DESTROY: 이미 윈도우의 파괴가 진행되었기 때문에 이 메시지가 전달되면 윈도우는 무조건 파괴가 된다는 의미.