#include <process.h>
#include <string>

struct MyData
{
    std::string ip;
    std::string port;
};

unsigned int __stdcall ServerThread(void* param)
{
    MyData* myData = (MyData*)param;

    // Daten gültig

    delete myData;

    return 0;
}

int main(int argc, char** argv)
{
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2,2), &wsaData);

    std::ifstream file(argv[1]);
    std::string row;

    while(std::getline(file, row))
    {
        unsigned int pos = row.find(":");

        MyData* myData = new MyData;

        myData->ip = row.substr(0, pos);
        myData->port = row.substr(pos + 1);

        _beginthreadex(0, 0, ServerThread, myData, 0, 0); // CreateThread() hat ein leak
    }

    file.close();

    std::cin.get(); // Whatever
}