To make this work in most menu bases at least in C++ do it like so,

Put these variables as global variables wherever you store yours.

bool getNearbyPeds = false //just an example if variable.
const int numElements = 10;
const int arrSize = numElements * 2 + 2;
int nearbyPed[arrSize];

Example use,

if(getNearbyPeds){
        nearbyPed[0] = numElements2;
        int count = PED::GET_PED_NEARBY_PEDS(PLAYER::PLAYER_PED_ID(), nearbyPed, -1);

        if (nearbyPed != NULL)
        {
            for (int i = 0; i < count; i++)
            {
                int offsettedID = i * 2 + 2;

                if (nearbyPed[offsettedID] != NULL && ENTITY::DOES_ENTITY_EXIST(nearbyPed[offsettedID]))
                {
                    NETWORK::NETWORK_REQUEST_CONTROL_OF_ENTITY(nearbyPed[i]);
                    if(NETWORK::NETWORK_HAS_CONTROL_OF_ENTITY(nearbyPed[i])){
                        if(!FIRE::IS_ENTITY_ON_FIRE(nearbyPed[i])){
                            FIRE::START_ENTITY_FIRE(nearbyPed[i]);
                            printf("Peds Grabbed: %i \n", count);
                            getNearbyPed = false;
                        }
                    }
                }
            }
        }
    }