I have a LabVIEW base version (v8.6) which does not have the event structure. I found it was quite inconvenient to monitor the status of several controls (the action after click a control depends on the status of other control(s)). Especially if I want to add another function (control), the effort increase exponentially with the existing number of controlsI got an idea of simulate the event structure using 'Shift Register'. First, I will bundle all the values of controls into a cluster. Then I will put the cluster in a while loop, and compare the value of the cluster with its previous value (xor the shift register). If the compare result is false (none of the control is changed), the program goes to next iteration. If the XOR result is true (one of the control was changed), then the program goes into event handling code (it will pass which control has changed, and the whole cluster). So for each control change, we can write a independent code to process the event. After processed the event, the event was cleared.The following is a section of my ugly code currently used to monitor several controls. And I am thinking of rewrite it using above idea so that there will be less likely a hiden bug.Any comments of suggestions? Message Edited by RyanWu on 10-23-2009 10:16 AM

I'm not entirely sure what I'm looking at in your picture of your block diagram because it looks like only the lower right hand quarter of your code. I would do the following to detect a change in a cluster control w/o the event structure: Does the base package include notifications or queus? You can put your "event handling" into another thread by this method: The advantage here is your main program loop doesn't get "bogged down" whenever a change in your cluster occures. It also helps seperate the code so that it is cleaner. Hope that helps! -nicker

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Simulate event structure in LabVIEW base?

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Simulate event structure in LabVIEW base?

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