Check if shutdown is initiated or not

Question

What is the win32 function to check if shutdown is initiated or not?

EDIT: I need to check this inside a windows service (COM). How to do it?

Answer 1

There is no real Win32 function to verify this.

Instead, Windows sends a message to WM_QUERYENDSESSIONeach application when shutdown starts.

You can reply to this message and, for example, cancel the shutdown. (Although you should not do this if absolutely necessary)

A message is sent before the actual shutdown WM_ENDSESSION.

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. MSDN .