Customising VirtualBox so that `Super+Tab` works normally

[BrainStein]

I know I need to press and release `Super` to change my keyboard's focus first, but I wanted to take it a step further and have the host listening for the specific keyboard shortcut `Super+Tab`, and capture it before the guest. I'm fine with all other key combos passing through my PC to the guest, I just want `Super+Tab` to be filtered.

Any ideas? From my understanding VirtualBox simply does not support this feature, although I'm happy to experiment external programs for this, I'm just looking for ideas to get me started on implementing this (and this may even give a headstart to anyone wanting to implement it in VirtualBox itself, since a similar functionality has already been requested multiple times before me).

Thanks!

[multiOS]

Personal Opinion: VirtualBox probably doesn't support such fetuare as it would produce a significant security risk, i.e. the VM would have to be left permanently accessible to external key-loggers and other user 'monitoring' possibilies.