Force car

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using GTA;

public class CarJump : Script
{
    private GTA.Timer powerTimer;

    private float force = 1;

    public CarJump()
    {
        this.powerTimer = new GTA.Timer(200);
        this.powerTimer.Tick += new EventHandler(this.PowerTimer_Tick);

        this.KeyDown += new GTA.KeyEventHandler(this.CarJump_KeyDown);
        this.KeyUp += new GTA.KeyEventHandler(this.CarJump_KeyUp);
    }

    private void PowerTimer_Tick(object sender, EventArgs e)
    {
        this.force += 1;

        Game.DisplayText("Jump force: " + this.force);
    }

    private void CarJump_KeyDown(object sender, GTA.KeyEventArgs e)
    {
        if (e.Key == Keys.K)
        {
            if (Player.Character.isInVehicle() == true)
            {
                this.powerTimer.Start();
            }
            else
            {
                Game.DisplayText("You need to get a vehicle first!");
            }
        }
    }

    private void CarJump_KeyUp(object sender, GTA.KeyEventArgs e)
    {
        if (e.Key == Keys.K)
        {
            if (Player.Character.isInVehicle() == true)
            {
                this.powerTimer.Stop();

                if (Player.Character.CurrentVehicle.isOnAllWheels)
                {
                    //GTA.Native.Function.Call("APPLY_FORCE_TO_CAR", Player.Character.CurrentVehicle, true, 0f, 0f, this.force, 0, 0, 0, true, true, true, true);

                    Player.Character.CurrentVehicle.ApplyForce(new Vector3(0f, 0f, this.force));
                }

                this.force = 1;
            }
            else
            {
                Game.DisplayText("You need to get a vehicle first!");
            }
        }
    }
}