I work on driver for UI-1410-M camera.I control camera by Active X LabVIEW functions and camera .ocx files.To accesses different methods of camera I use Invoke Node.I need count number of frames that occur by using FrameEvent(camera feature).I want increase counter each time when event occur. To count frames I use Reg Event Callback.To activate this func properly I need connect Event callback to VI.ref.My question is how I nedd modify VI.ref to get the number of events.
Its currently hard to understand what exactly you are trying to accomplish without having the driver and the .ocx file. I have attached a .llb that contains an example which I think does something similar to what you are trying to achieve. This example (ActiveX Event Callback for IE.vi) is in LabVIEW 7.1 and should definitely get you headed in the right direction.