Programmatically determine if ip address is assigned via dhcp or manually set in Java

So, as you requested Win NT 'solution' only, here is my code.It lists network interfaces with current configured values.

Note EnableDHCP registry key value, I think this is the point.

As I already mentioned in comment under your question, you need as least simple JNI wrapper.

Hope this helps.

more info here : http://support.microsoft.com/kb/314053

#include <windows.h>

#define NETCARD_ROOT    L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
#define TCPIP_ROOT  L"SYSTEM\\CurrentControlSet\\services\\Tcpip\\Parameters\\Interfaces"

int _tmain(int argc, _TCHAR* argv[])
{

    //First enumerate all network adapters

    HKEY hNetCardsKey;
    LSTATUS lStatus = ERROR_SUCCESS;

    lStatus = RegOpenKey(HKEY_LOCAL_MACHINE, 
        NETCARD_ROOT, 
        &hNetCardsKey);

    if(ERROR_SUCCESS == lStatus)
    {
        DWORD dwCards = 0L;
        DWORD dwMaxSubkeyNameLen = 0L;
        lStatus = RegQueryInfoKey(hNetCardsKey, NULL, NULL, NULL, &dwCards, 
            &dwMaxSubkeyNameLen, NULL, NULL, NULL, NULL, NULL, NULL);

        if(ERROR_SUCCESS == lStatus && dwCards)
        {
            for(DWORD i = 0; i < dwCards; i++)
            {
                TCHAR wszCurrentCardIdxName[MAX_PATH];
                wszCurrentCardIdxName[0] = '\0';
                lStatus = RegEnumKey(hNetCardsKey, i, 
                    wszCurrentCardIdxName, MAX_PATH);

                if(ERROR_SUCCESS == lStatus)
                {
                    TCHAR wszAdapterKeyName[MAX_PATH];
                    wszAdapterKeyName[0] = '\0';

                    wsprintf(wszAdapterKeyName, L"%s\\%s", NETCARD_ROOT, 
                        wszCurrentCardIdxName);

                    HKEY hCardNameKey;

                    lStatus = RegOpenKey(
                        HKEY_LOCAL_MACHINE, 
                        wszAdapterKeyName, 
                        &hCardNameKey);

                    if(ERROR_SUCCESS == lStatus)
                    {
                        TCHAR wszServiceNameGuid[MAX_PATH];
                        TCHAR wszAdapterName[MAX_PATH];

                        DWORD dwSize = sizeof(wszServiceNameGuid);
                        wszServiceNameGuid[0] = '\0';
                        RegQueryValueEx(
                            hCardNameKey, 
                            L"ServiceName",
                            NULL, 
                            NULL,
                            (LPBYTE)wszServiceNameGuid,
                            &dwSize);

                        dwSize = sizeof(wszAdapterName);
                        RegQueryValueEx(
                            hCardNameKey, 
                            L"Description",
                            NULL, 
                            NULL,
                            (LPBYTE)wszAdapterName,
                            &dwSize);

                        OutputDebugStringW(wszServiceNameGuid);
                        OutputDebugStringW(L"\n");

                        RegCloseKey(hCardNameKey);

                        //Get parameters
                        TCHAR wszCardParamKey[MAX_PATH];
                        wszCardParamKey[0] = '\0';
                        wsprintf(wszCardParamKey,L"%s\\%s", TCPIP_ROOT, wszServiceNameGuid);

                        HKEY hParamKey = NULL;

                        lStatus = RegOpenKey(
                            HKEY_LOCAL_MACHINE, 
                            wszCardParamKey, 
                            &hParamKey);

                        if(ERROR_SUCCESS == lStatus)
                        {
                            DWORD dwEnabledDHCP = 0L;
                            DWORD dwDWSize = sizeof(DWORD);
                            TCHAR wszStaticIP[32];
                            TCHAR wszDHCPIP[32];
                            DWORD dwIPSize = sizeof(wszDHCPIP);

                            ZeroMemory(wszDHCPIP, dwIPSize);
                            ZeroMemory(wszStaticIP, dwIPSize);

                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"EnableDHCP", 
                                NULL, NULL, 
                                (LPBYTE)&dwEnabledDHCP, 
                                &dwDWSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"Adapter : %s [%s] \n\tDHCP : %s\n", 
                                    wszServiceNameGuid, 
                                    wszAdapterName,
                                    dwEnabledDHCP 
                                    ? L"Yes" : L"No");
                            }

                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"IPAddress", 
                                NULL, 
                                NULL, 
                                (LPBYTE)&wszStaticIP, 
                                &dwIPSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"\tConfigured IP Address : %s\n", wszStaticIP);
                            }

                            dwIPSize = sizeof(wszDHCPIP);
                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"DhcpIPAddress", 
                                NULL, 
                                NULL, 
                                (LPBYTE)&wszDHCPIP, 
                                &dwIPSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"\tDHCP IP Address : %s\n", wszDHCPIP);
                            }

                            wprintf_s(L"\n");

                            RegCloseKey(hParamKey);
                        }

                    }
                }
            }
        }


        RegCloseKey(hNetCardsKey);
    }


    return 0;
}

Simple output:

Adapter : {6EC2554F-3359-43A2-AADB-57F427DC72FC} [Marvell Yukon 88E8072 PCI-E Gigabit Ethernet Controller]
        DHCP : No
        Configured IP Address : 192.168.5.10
        DHCP IP Address : 192.168.1.102

Adapter : {2A28BDA8-ED1D-4E6E-8990-485EE1836828} [Sony Ericsson Device 0016 USB Ethernet Emulation (NDIS 5)]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 0.0.0.0

Adapter : {491DC095-155F-4572-B975-2E1703C17632} [Microsoft Windows Mobile Remote Adapter]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 169.254.2.2

Adapter : {5F987E64-E804-42DA-9453-8E479B6FC835} [Broadcom 802.11b/g Network adapter]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 192.168.1.14