如何以编程方式检查VC++中的Internet带宽？

#include<iostream>
#include <wininet.h>

int main()
{
    DWORD dwStatus = 0;
    if (!InternetGetConnectedState(&dwStatus, NULL))
    {
        std::cout << "Not connected to the Internet"<< std::endl;
        return 1;
    }

    std::cout << "Connected to the Internet"<< std::endl;

    DWORD dwAvailable = 0;
    if (!InternetQueryDataAvailable(NULL, &dwAvailable, 0, 0))
    {
        std::cout << "Error querying available data"<< std::endl;
        return 1;
    }

    std::cout << "Available data: " << dwAvailable << " bytes"<< std::endl;

    return 0;
}