Get the domain name of a computer from Windows API

Question

In my application I need to know if the computer is the primary domain controller of a domain, so I need to know the domain of the computer to call NetGetDCName function.

Thanks.

EDIT: The problem is related with the DCOM authentication so I need to know the domain to use the DOMAIN\USERNAME in case of a PDC or COMPUTER\USERNAME if I need to use the local authentication database of the computer.

C++ and WinAPI tags yet edited to make not-programming-related? — Robin Day, May 18 '09 at 16:47
It does seem to be programming related, just a very simple question that might be mistaken for not programming related. — Stefan Thyberg, May 18 '09 at 16:48
I need to get the the name using winapi, so is programming related. I think :s — Jesus Fernandez, May 18 '09 at 16:49
Removed tag. I can't yet edit the question to flesh it out, and that's a little frustrating... — Michael Petrotta, May 18 '09 at 16:49
Is it really not programming related or should the question just have more detail? "How do I pragmatically get the domain name of a computer?" — Dan Adams, May 18 '09 at 16:50
Pragmatically is nice, but I'd prefer to do it programatically. :-) — Stefan Thyberg, May 18 '09 at 16:56

score 17 · Answer 1 · edited Feb 05 '13 at 14:47

The NetWkstaGetInfo() function returns either the domain name or the workgroup of the computer, and is therefore not a reliable way to determine if the computer is a member of a domain.

The GetComputerNameEx() function will help, used with the ComputerNameDnsDomain parameter, as shown below. This will return an empty string if the computer is in a workgroup, or the DNS name of the domain:

DWORD bufSize = MAX_PATH;
TCHAR domainNameBuf[ MAX_PATH ];

GetComputerNameEx( ComputerNameDnsDomain, domainNameBuf, &bufSize );

score 7 · Accepted Answer · answered May 18 '09 at 16:58

I would consider using NetWkstaGetInfo() and pass the local computer name is that first parameter.

#include <Lmwksta.h>
#include <StrSafe.h>

WCHAR domain_name[256];
WKSTA_INFO_100 info = {0};
if (NERR_Success == NetWkstaGetInfo(L"THIS-COMPUTER", 100, &info) && 
    SUCCEEDED(StringCchCopy(domain_name, ARRAYSIZE(domain_name), info.wki100_langroup))) {
    // use domain_name here...
}

score 3 · Answer 3 · answered May 18 '09 at 16:58

3

You can use the NetWkstaGetInfo Function do this.

If you pass in null for the computer name it returns info about the local computer.

It will return a WKSTA_INFO_100 instance, which includes the domain name.

answered May 18 '09 at 16:58

Scott Wisniewski

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Rômulo Ceccon · Answer 4 · 2009-05-18T17:25:53.083

3

If you just want to know if the machine the code is running is the primary domain controller I think your best option is NetServerGetInfo. If you pass 101 as the level parameter it returns an SERVER_INFO_101 structure. Then look for its sv101_type member:

sv101_type

The type of software the computer is running. This member can be one of the following values.

(...)

SV_TYPE_DOMAIN_CTRL: A primary domain controller.

edited May 18 '09 at 17:25

answered May 18 '09 at 17:10

Rômulo Ceccon

10,081
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I need to know if the computer is PDC and the name of the domain. Thanks. – Jesus Fernandez May 18 '09 at 17:17

score 2 · Answer 5 · answered Aug 05 '18 at 09:18

There is a specific function to determine the join status of a Workstation. https://learn.microsoft.com/en-gb/windows/desktop/api/lmjoin/nf-lmjoin-netgetjoininformation

THere can be 3 statussus, 'Joined' to a workgroup (The good old Windows 3.0 networking) status == NetSetupWorkgroupName, or joined to a domain status == NetSetupDomainName or unjoined (standalone) status == NetSetupUnjoined

So if you know this, you can call the respective required functions in a reliable way.

score 0 · Answer 6 · answered May 19 '09 at 10:55

Finally I have used this code. It works in local machine, executed remotely nStatus gives a ACCESS_DENIED error.

NET_API_STATUS nStatus;
TOleString oleServerName=strServerName.c_str();
DWORD dwLevel=101;
LPSERVER_INFO_101 pBufServer=NULL;
LPWKSTA_INFO_100 pBufWksta = NULL;

nStatus=NetServerGetInfo(oleServerName, dwLevel,
    (LPBYTE*)&pBufServer);
if(nStatus==NERR_Success &&
    (pBufServer->sv101_type & SV_TYPE_DOMAIN_CTRL))
{
    dwLevel=100;
    nStatus=NetWkstaGetInfo(oleServerName, 100,
        (LPBYTE*)&pBufWksta);

    if(nStatus==NERR_Success)
    {
        AnsiString strDomain(pBufWksta->wki100_langroup);

        m_pgServerConnection->SetDomain(strDomain);
    }
}

Thanks to all :)

I get ACCESS_DENIED also on local machine. It required admin rights to work properly. — Kebechet, Oct 30 '20 at 08:27

Get the domain name of a computer from Windows API

6 Answers6

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