Common error on windows 10 when trying to start Apache 2.4, error saying that port 443 is already in used.
What I had forgotten about WM_CLOSE
What happens when you call WM_CLOSE and close a window.
Preventing embedded python from killing your app
If you call sys.exit(1); from inside your embedded code you run the risk of closing you app, (as exit will be called). This post explains how to prevent this from happening.