Without knowing your exact application I can think of two simple ways that might work. First, you can put the event structure in a parallel loop with the rest of the structure. This will do exactly what you are asking for. However, now you have to be careful in your programming in terms of how you transfer the new values from one loop to another.
A second method that could be useful is to have an event structure with a short timeout. This will limit the amount of time that is spent waiting on the event structure during each iteration of your program. This method is easier in terms of data transfer but loses some of the advantages of the event structure. In most cases I would prefer the first option.
