How to execute code during windows form [C++]

I was wondering how I'd Execute my network code during the form is running because if I put it in the comment area where it says "Code To Execute here" it will run AFTER the form exists but not DURING when it's running.

#include "Mouse.h"
#include <SFML\System.hpp>
#include <SFML\Network.hpp>
#include <SFML\Audio.hpp>
#include <iostream>
#include <iomanip>
#include <iterator>
#include <Windows.h>

using namespace std;
using namespace System;
using namespace System::Windows::Forms;

[STAThread]

int main(array<String^>^ arg) {
    Application::EnableVisualStyles();
    Application::SetCompatibleTextRenderingDefault(false);

    Administration::Mouse form;
    Application::Run(%form)

    /* code i wanted to execute goes here */

}

Thanks in Advance