[iggy1]

There is no such include. Sa-mp can only detect certain keys depending on your state. If you look on the wiki you can see which keys are being watched and which state you must be.
They are labeled "Gametext-Key on Foot" and "Gametext-Key in Vehicle".
So if your in a vehicle you can't detect some keys and vice versa.
https://sampwiki.blast.hk/wiki/GetPlayerKeys