How do I retrieve remote client's name

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Windows

server-management

C++14

, +

I am trying to write a C++ DLL that would run on VMWare server and would return the client (terminal user) Name and IP Address.

I am using WTSQuerySessionInformation to fetch the ClientName & IP Address. Is

WTSQuerySessionInformation 

the right function, or is there a different way to solve this problem?

What I have tried:

ClientName:
The problem with ClientName is that

WTSQuerySessionInformation

returns the IP address separate by hyphen (like 10-0-156-234) instead of the Client Name. Could you please help me understand if I have done anything wrong here?

LPTSTR szClientName = NULL;
DWORD dwSize = 0;
String^ cliName = String::Empty;

if (WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, TSClientName, &szClientName, &dwSize))
{
    cliName = gcnew String(szClientName, 0, dwSize);
}

return cliName;

IP Address:
I tried to bypass the above issue by fetching the IP Address and then the hostname and I was successful too when I ran the code from within the organization's network.

But when I login from home to the company's VPN and try the same, it gives me a NAT:ted IP which obviously doesn't map to a Computer Name. Is there any way I can find the "real" IP Address connected to the server. Or if that's not possible, if I can find the computer name, that works fine for me.

LPTSTR ppBuffer = NULL;
DWORD  pBytesReturned = 0;
PWTS_CLIENT_ADDRESS pWTSCA = NULL;

WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, WTSClientAddress, &ppBuffer, &pBytesReturned);

pWTSCA = (PWTS_CLIENT_ADDRESS)ppBuffer;

String^ addrStr = String::Empty;
for (int i = 2; i < 6; i++)
{
    addrStr += Convert::ToString(pWTSCA->Address[i]);
    if (i != 5)
        addrStr += ".";
}