protected unsafe void EnableActionVolumeControlEnabled()
        {
            iCallbackVolumeControlEnabled = new CallbackVolumeControlEnabled(DoVolumeControlEnabled);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceLinnCoUkComponent1EnableActionVolumeControlEnabled(iHandle, iCallbackVolumeControlEnabled, ptr);
        }
 static extern void DvServiceLinnCoUkComponent1EnableActionVolumeControlEnabled(uint aHandle, CallbackVolumeControlEnabled aCallback, IntPtr aPtr);