Hibernation in wxWinCE

Smartphone and PocketPC will send a wxEVT_HIBERNATE to the application object in low memory conditions. Your application should release memory and close dialogs, and wake up again when the next wxEVT_ACTIVATE or wxEVT_ACTIVATE_APP message is received. (wxEVT_ACTIVATE_APP is generated whenever a wxEVT_ACTIVATE event is received in Smartphone and PocketPC, since these platforms do not support WM_ACTIVATEAPP.)