Location:
ecam.h
const TUid KUidECamEventReserveComplete;
Uid used to identify the event that the request to Reserve() has completed
const TUid KUidECamEventPowerOnComplete;
Uid used to identify the event that the request to PowerOn() has completed
const TUid KUidECamEventCameraNoLongerReserved;
Uid used to identify the event that the client has lost control of the camera