Plugin Help

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GTA;
using GTA.Math;
using System.Windows.Forms;
using System.Drawing;
using GTA.Native;
using LSPD_First_Response.Mod.Callouts;
using LSPD_First_Response.Mod.API;
using LSPD_First_Response.Engine.Scripting.Entities;
using LSPD_First_Response.Engine.UI;

namespace NPCKILLER
{
    public class attacker : Script
    {
        private EventHandler onTick;

        public attacker()
        {
            this.Tick += onTick;
            this.KeyDown += onKeyDown;
        }

        private void onKeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.NumPad7)
            {
                Functions.RequestBackup(Player.LSPD_First_Response.EBackupResponseType.Code3, LSPD_First_Response.EBackupUnitType.NooseTeam);
            }
        }
    }
}