Example Code for Ranging with IDirectoryObject

The following code example uses ranging to retrieve the members of a group using the IDirectoryObject interface.

//***************************************************************************
//
//  EnumGroupWithIDirectoryObject()
//
//***************************************************************************

HRESULT EnumGroupWithIDirectoryObject(LPCWSTR pwszGroupDN, 
                                      LPCWSTR pwszUsername, 
                                      LPCWSTR pwszPassword)
{
    if(NULL == pwszGroupDN)
    {
        return E_POINTER;
    }
    
    HRESULT hr;
    IDirectoryObject *pdo;

    hr = ADsOpenObject( pwszGroupDN,
                        pwszUsername,
                        pwszPassword,
                        ADS_SECURE_AUTHENTICATION,
                        IID_IDirectoryObject, 
                        (void**)&pdo);

    if(SUCCEEDED(hr))
    {
        PADS_ATTR_INFO pAttrInfo;
        const DWORD dwStep = 1000;
        DWORD dwLowRange;
        DWORD dwHighRange;
        DWORD dwRetrieved;
        WCHAR wszAttr[MAX_PATH];
        LPWSTR rgAttrs[1];

        rgAttrs[0] = wszAttr;

        dwLowRange = 0;
        dwHighRange = dwLowRange + (dwStep - 1);
         
        do
        {
            swprintf_s(wszAttr, L"member;range=%d-%d", dwLowRange, dwHighRange);
            hr = pdo->GetObjectAttributes(rgAttrs, 1, &pAttrInfo, &dwRetrieved);        
            if(SUCCEEDED(hr))
            {
                DWORD i;
                
                for(i = 0; i < dwRetrieved; i++)
                {
                    DWORD x;

                    for(x = 0; x < pAttrInfo[i].dwNumValues; x++)
                    {
                        wprintf(L"%s\n", pAttrInfo[i].pADsValues[x].CaseIgnoreString);
                    }
                }

                FreeADsMem(pAttrInfo);

                dwLowRange = dwHighRange + 1;
                dwHighRange = dwLowRange + (dwStep - 1);
            }

            if(0 == dwRetrieved)
            {
                break;
            }

        }while(SUCCEEDED(hr));
        
        pdo->Release();
    }

    return hr;
}