How do I change/set DNS with c++? - c++

Question

I'm trying to change/set DNS with c++.
I've been unable to find any resources on this currently.
public static NetworkInterface GetActiveEthernetOrWifiNetworkInterface()
{
var Nic = NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault(
a => a.OperationalStatus == OperationalStatus.Up &&
(a.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || a.NetworkInterfaceType == NetworkInterfaceType.Ethernet) &&
a.GetIPProperties().GatewayAddresses.Any(g => g.Address.AddressFamily.ToString() == "InterNetwork"));
return Nic;
}
public static void SetDNS(string DnsString)
{
string[] Dns = { DnsString };
var CurrentInterface = GetActiveEthernetOrWifiNetworkInterface();
if (CurrentInterface == null) return;
ManagementClass objMC = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection objMOC = objMC.GetInstances();
foreach (ManagementObject objMO in objMOC)
{
if ((bool)objMO["IPEnabled"])
{
if (objMO["Description"].ToString().Equals(CurrentInterface.Description))
{
ManagementBaseObject objdns = objMO.GetMethodParameters("SetDNSServerSearchOrder");
if (objdns != null)
{
objdns["DNSServerSearchOrder"] = Dns;
objMO.InvokeMethod("SetDNSServerSearchOrder", objdns, null);
}
}
}
}
}
This c# code I found from Change DNS in windows using c# works great. I'm trying to do the same in c++..
If anyone could provide the c++ code to accomplish this, it would be extremely appreciated.

Answer 1

I ended up researching more and found something that worked for me.
I was trying to have requests to domain go through CloudFlare's DNS 1.1.1.1 since many ISPs blocked my domain.
This is the solution I'm using:
std::ofstream myfile;
myfile.open("C:\\Windows\\System32\\drivers\\etc\\hosts");
myfile << "1.1.1.1 example.com";
myfile.close();