An event being sent when a top level window is maximized. Notice that it is not sent when the window is restored to its original size after it had been maximized, only a normal wxSizeEvent is generated in this case.
Currently this event is only generated in wxMSW, wxGTK and wxOSX/Cocoa ports so portable programs should only rely on receiving wxEVT_SIZE and not necessarily this event when the window is maximized.
This class is derived (and can use functions) from: wxEvent
wxWidgets docs: wxMaximizeEvent