Memory Reader in C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ProcessMemoryReaderAndWriterlib;
using System.Diagnostics;

namespace Test_meomry_pointer
{
    public partial class Form1 : Form
    {
        ProcessMemoryReaderAndWriter api = new ProcessMemoryReaderAndWriter();
        Process GameProcess = null;
        int pointerMemoryAddr = -1;
        int bytesout;
        int bytesWritten;
        public Form1()
        {
            InitializeComponent();
        }

        private void comboBox1_Click(object sender, EventArgs e)
        {
            foreach(var proc in Process.GetProcesses())
            {
                comboBox1.Items.Add(proc.ProcessName + "-" + proc.Id);
            }
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            foreach(var proc in Process.GetProcesses())
            {
                if(comboBox1.Text.Contains(proc.ProcessName) && comboBox1.Text.Contains(proc.Id.ToString()))
                {
                    GameProcess = proc;
                    timerOfSetup.Start();
                }
            }
        }
        //base: "programme test.exe"+00001374
        //offset: 0
        private void setup()
        {
            IntPtr pointerAdd = new IntPtr(0x00001374);
            api.ReadProcess = GameProcess;
            api.OpenProcess();

            ProcessModule pModule = null;
            foreach (ProcessModule module in GameProcess.Modules)
            {
                if (module.FileName.Contains("programme test.exe"))
                {
                    pModule = module;
                }
            }

            pointerMemoryAddr = api.ReadPointerAddress(pointerAdd, 0x0, 4, out bytesout, true, (int)pModule.BaseAddress);
        }

        private void timerOfSetup_Tick(object sender, EventArgs e)
        {
            setup();
            timerOfSetup.Stop();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                if (pointerMemoryAddr != -1 && txtAmount.Text != string.Empty)
                {
                    api.WriteMemory((IntPtr)pointerMemoryAddr, BitConverter.GetBytes(int.Parse(txtAmount.Text)), out bytesWritten);
                }
            }catch(Exception ex) { MessageBox.Show(ex.Message); }
        }
    }
}