I have done a bit of testing and I think we should be able to insert functions into the VI-Peek window when the user selects a VI in a LabVIEW project. There aren't events that you can really look for but you can always poll the active project and get a reference to the selected item which you could then use to build a Standard VI class to insert into the peek stack.
Inserting anything other than a standard VI seems like it would be very difficult but because you are specifically selecting an item in the project I'm not sure it's that important anyway.
Even if this functionality was added I would probably want it as a toggleable behavior.
I have done a bit of testing and I think we should be able to insert functions into the VI-Peek window when the user selects a VI in a LabVIEW project. There aren't events that you can really look for but you can always poll the active project and get a reference to the selected item which you could then use to build a Standard VI class to insert into the peek stack.
Inserting anything other than a standard VI seems like it would be very difficult but because you are specifically selecting an item in the project I'm not sure it's that important anyway.
Even if this functionality was added I would probably want it as a toggleable behavior.