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Hey fellow LAVA people. I just turned 50 on April 2nd, and wanted to do something challenging for me, both mentally a physically. I'm running 10K every day for a year and raising money for cancer research. If you want to follow along on my journey, you can subscribe to the 10K365 youtube channel for the latest. Then go on over to 10K365.com and give whatever you can. Thanks, I consider all of you as friends and one of the reasons I love LabVIEW.

FP:Open only tells you if the front panel is open anywhere. This may be enough, if you only want to distinguish the two states "closed" and "open in subpanel". But what if you'd like to distinguish (1) "closed", (2) "open as separate window" and (3) "open in subpanel"? I just found a very interesting private VI property: Front Panel Window:OS window. This property returns 0 if there is no OS window for this VI (which is the cases for (1) and (3)). If the VI has it's own window, this property returns a number >0 (case (2)). In combination with FP:Open, this enables you to tell exactly what the state of the panel really is.