What is the lifetime of a CWnd obtained from CWnd::FromHandle?

Question

According to msdn, when I get a CWnd* with CWnd::FromHandle,

The pointer may be temporary and should not be stored for later use.

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Answer 1

Based on the same MSDN description, I would assume that this means that if no CWnd is attached to the hWnd provided as an object, it will create a temporary CWnd which probably gets destroyed once something goes out of scope, or a destructor elsewhere is called, or a CWnd is explicitly created for the hWnd in question. So if you already have a CWnd created, you should be OK, otherwise you will probably need to be very careful with storing the pointer you receive.