Question

Under POSIX OS there is signal API that allows to send a signal to process to shut it down
with kill and you can catch it with sigaction and do what you need;

However, Win32 is not POSIX system, so:

• How can I handle shutdown events that may come, for example from “End Process” in “Task manager”?
• What is the standard API for sending shutdown signal to Win32 application?

I’m not talking about GUI, I’m talking about TCP/IP server that should be nicely shutdown. that does not run like windows service.

Answer 1

You get a WM_QUIT message on your first created thread.

When you don’t handle that, your process is forcibly shutdown.

So just implement a message queue in your first thread, which looks for the WM_QUIT message