#define MY_MESSAGE_NOTIFICATION 1048
#include "windows.h"
#include "winsock.h"

SOCKET server_socket;
WSADATA wsadata;


LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message) //handle the messages
    {
    case MY_MESSAGE_NOTIFICATION: //Is a message being sent?
        {
            switch (lParam) //If so, which one is it?
            {
                case FD_ACCEPT:
                    //Connection request was made
                    break;

                case FD_CONNECT:
                    //Connection was made successfully
                    break;

                case FD_READ:
                    //Incoming data; get ready to receive
                    break;

                case FD_CLOSE:
                    //Lost the connection
                    break;
            }
        }
    default: //The message doesn't concern us
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
}

int ListenOnPort(int portno);
void CloseConnection();

int WINAPI WinMain(HINSTANCE CurrentInstance, HINSTANCE hPrevInstance, LPSTR Arguments, int nCmdShow)
{

    ListenOnPort(2158);
    MessageBox(NULL, "X","X",NULL);
    CloseConnection();
    return true;
}


int ListenOnPort(int portno)
{
    int error = WSAStartup(0x0202, &wsadata);

    if(error)
    {
        return false;
    }

    if(wsadata.wVersion != 0x0202)
    {
        WSACleanup();
        return false;
    }

    SOCKADDR_IN addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(portno);
    addr.sin_addr.s_addr = htonl(INADDR_ANY);

    server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    if(server_socket == INVALID_SOCKET)
    {
        return false;
    }

    if(bind(server_socket, (LPSOCKADDR)&addr, sizeof(addr)) == SOCKET_ERROR)
    {
        return false;
    }

    listen(server_socket, SOMAXCONN);
    WSAAsyncSelect(server_socket, hwnd, MY_MESSAGE_NOTIFICATION, (FD_ACCEPT | FD_CONNECT | FD_READ | FD_CLOSE));
    return true;
}

void CloseConnection()
{
     if(server_socket)
         closesocket(server_socket);
     WSACleanup();
}