Priority key events

Priority key events are configured using RWindowGroup::AddPriorityKey(), and obtained by the client using the functions described in Getting priority key events. All priority key events generated by the window server are delivered to the client in a TWsPriorityKeyEvent, and the client obtains the priority key event using RWsSession::GetPriorityKey().

Priority key events are typically used for providing "Abort" or "Escape" keys for an application.