protected unsafe void EnableActionSetStateVariable()
        {
            iCallbackSetStateVariable = new CallbackSetStateVariable(DoSetStateVariable);
            IntPtr ptr = GCHandle.ToIntPtr(iGch);

            DvServiceLinnCoUkDiagnostics1EnableActionSetStateVariable(iHandle, iCallbackSetStateVariable, ptr);
        }
 static extern void DvServiceLinnCoUkDiagnostics1EnableActionSetStateVariable(uint aHandle, CallbackSetStateVariable aCallback, IntPtr aPtr);