F-Lock Keyboard Indicator

We often receive feedback like that:

I was hoping to find something that would indicate my current FLock status (Microsoft Natural 4000 keyboard). This didn't do it.

So we've made some investigation:

  1. F-Lock state cannot be controlled by software.
  2. The only way to detect is F-Lock On or Off is wait until user press some of Fx keys and compare the scan code.

Sorry, we have no idea how to make F-Lock indicator :(

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