B.Wagner,
As I mentioned to SergueiK you might also want to implement the producer/consumer (Events) design model, it the most efficient (in my experience) with acquisition programs (and most others), personally it is pretty much the only design model I use for Top Level VIs....You can find tutorials about it on the NI site, and there is a template for a basic one in LabView->New->Templates
Personally I modify the one present to use an enum (type def'ed) instead of the string. Enums automatically show the enum name in case structures, makes it more readable.
In anycase, if you feel the need for more help start a new thread (or reference an older one) and post the link in here, and I can address it directly there (posting your code might be a good idea too).
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using LV 2010 SP 1, Windows 7
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