OnPlayerKeyStateChange lock system

#include <a_samp>

#define PRESSED(%0) \
    (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

#define RELEASED(%0) \
    (((newkeys & (%0)) != (%0)) && ((oldkeys & (%0)) == (%0)))

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if (PRESSED(KEY_WALK))//LALT KEY
    {
        if (IsPlayerInAnyVehicle(playerid))
        {
            for(new i = 0; i < MAX_PLAYERS; i++)
            SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i,false,true);
            GameTextForPlayer(playerid, "Locked", 5000, 3);
        }
        if (PRESSED(KEY_ACTION))//TAB KEY
    {
        if (IsPlayerInAnyVehicle(playerid))
        {
            for(new i = 0; i < MAX_PLAYERS; i++)
            SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i,false,false);
            GameTextForPlayer(playerid, "Unlocked", 5000, 3);
        }
    }
    }
    return 1;
}