Boolean toggle switch from main vi controlled in subvi

[clos242003]

I have a main vi with multiple subvis.  One subvi is used as a display for a monitor showing all necessary indicators for the test subject and test conductor.  I would like to have control over a main vi boolean toggle switch from within the display subvi since the subvi will be what the subject and conductor sees on the monitor.  Any idea how to accomplish this?  Thanks. 

[Wolleee]

You will need to pass a reference from the main vi into the sub vi.  There is a few links to get you started.

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YHpJCAW&l=en-US

https://forums.ni.com/t5/Example-Code/Using-Control-References-to-Pass-Access-of-Front-Panel-Control...