This class is used for system colour change events, which are generated when the user changes the colour settings using the control panel. This is only appropriate under Windows.
Remark: The default event handler for this event propagates the event to child windows, since Windows only sends the events to top-level windows. If intercepting this event for a top-level window, remember to call the base class handler, or to pass the event on to the window's children explicitly.
See: Overview events
This class is derived (and can use functions) from: wxEvent
wxWidgets docs: wxSysColourChangedEvent