[Ceez]

How to detect a button being pressed:

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)

Here's a link to all of the KEY_'s
https://sampwiki.blast.hk/wiki/GetPlayerKeys#Key_List

To detect if a command made in an area / zone:

pawn Код:

if(IsPlayerInRangeOfPoint(playerid, RANGE, PosX, PosY, PosZ))
{
      .... // code
}

Replace RANGE with the max distance from player to points ( PosX, Y and Z).

Good luck! REP if I helped