@class wxShowEvent
An event being sent when the window is shown or hidden.
+ The event is triggered by calls to wxWindow::Show(), and any user
+ action showing a previously hidden window or vice versa (if allowed by
+ the current platform and/or window manager).
+ Notice that the event is not triggered when the application is iconized
+ (minimized) or restored under wxMSW.
Currently only wxMSW, wxGTK and wxOS2 generate such events.