Windows maximization on desktops

[Paul Dupuis]

Is there a message sent when a user click the maximize icon (macOS and 
Windows) in the titlebar of a window?

"iconifyStack" is sent for minimization, and "unIconifyStack" is sent 
when a minimizaed stack is expanded (from the Windows taskbar or Apple 
dock). However, I can't seem to find an equivalent message for maximization?

Is there such a message. What messages (if any) are sent when a window 
is maximized?