KeyFocus and FP.IsFrontMost aren't working

I'm having troubles get key focus on a control in a subvi that I am showing dynamically. I'd like to be able to leave the VI running in the background, registered for events on its caller. In this example, I have the subvi registering for events when the user preses "Enter"/"Return" on its parent. Then, I am programmatically showing the subvi's front panel, and attempting to set key focus for a string control on the FP:
Everything is working properly, except I can't for the life of me get this subvi to move to the front and give keyfocus to the "String" control. Originally, I just had the FP.Open method followed by the value/keyfocus property nodes, thinking that would be sufficient. Later, I found a KB suggesting that I might need to add the FP.IsFrontmost property. But it still doesn't seem to work.
The probe #11 as showin in this capture always returns FALSE, despite showing no upstream error when I set the FP.IsFrontmost property immediately beforehand.
I've tried introducing waits and moving the operations to separate dynamic user event cases; still no joy.
Am I missing something dumb here, or is there some apocryphal magic incantation that needs to happen to get LV to accept my frontmost/keyfocus assertions?

TurboPhil wrote:
I guess "Floating" behavior doesn't play nice with those properties/methods, although I can't come up with a good explanation as to why.
I never looked for an official explanation, but my understanding of floating or modeless windows is that by definition they're not part of the "proper" window stack and they don't maintain focus, because they are there to provide single click functions. That would certainly seem to be a reasonable explanation for such behavior.
Try to take over the world!

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KeyFocus and FP.IsFrontMost aren't working

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