protected unsafe void EnableActionSetPresetVisible()
        {
            iCallbackSetPresetVisible = new CallbackSetPresetVisible(DoSetPresetVisible);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceLinnCoUkDelay1EnableActionSetPresetVisible(iHandle, iCallbackSetPresetVisible, ptr);
        }
 static extern void DvServiceLinnCoUkDelay1EnableActionSetPresetVisible(uint aHandle, CallbackSetPresetVisible aCallback, IntPtr aPtr);