Intercept WM_CLOSE for cleanup operations

Question

I have an external application that calls my application and is supposed to end it when the job is done. The log from this external application claims it uses WM_CLOSE

Answer 1

The official solution for console applications is HandlerRoutine, a callback set by SetConsoleCtrlHandler. Windows will call your handler with a CTRL_CLOSE_EVENT argument in case of a WM_CLOSE exit.

When you're using a class method with SetConsoleCtrlHandler, it must be a static method - Windows won't provide you with a this pointer.