DeadKey
uint8 DeadKey(uint32 keyCode, uint32 modifiers,
uint8 deadKey = DeadKey(keyCode, modifiers, &enabled);
int32 deadKey = fKeymap->DeadKey(key, modifiers, &isEnabled);
uint8 deadKey = fKeymap->DeadKey(key->code, fModifiers, &isEnabled);
deadKey = fKeymap->DeadKey(key->code, fModifiers, &isDeadKeyEnabled);