WM_QUERYENDSESSION how?

[Little John]

It seems to be something new starting with Vista:

https://msdn.microsoft.com/en-us/librar ... s.85).aspx

Unfortunately, I don't have PB code that handles this scenario on Windows Vista+.
However, here is a link to more detailed information on this topic:
https://msdn.microsoft.com/en-us/library/ms700677.aspx