notes/os/win/api/ctrl-c.txt

// Prevent application from shutting down due to Ctrl-Break or Ctrl-C
// keypresses, window close button clicks, user logoff, or system shutdown.

#pragma argsused
BOOL Handler (DWORD dwCtrlType)
{
	return TRUE;
}

SetConsoleCtrlHandler ((PHANDLER_ROUTINE) Handler, TRUE);