IADs::PutEx method (iads.h)

Article
10/13/2021

The IADs::PutEx method modifies the values of an attribute in the ADSI attribute cache. For example, for properties that allow multiple values, you can append additional values to an existing set of values, modify the values in the set, remove specified values from the set, or delete values from the set.

Syntax

HRESULT PutEx(
  [in] long    lnControlCode,
  [in] BSTR    bstrName,
  [in] VARIANT vProp
);

Parameters

[in] lnControlCode

Control code that indicates the mode of modification: Append, Replace, Remove, and Delete. For more information and a list of values, see ADS_PROPERTY_OPERATION_ENUM.

[in] bstrName

Contains a BSTR that specifies the property name.

[in] vProp

Contains a VARIANT array that contains the new value or values of the property. A single-valued property is represented as an array with a single element. If InControlCode is set to ADS_PROPERTY_CLEAR, the value of the property specified by vProp is irrelevant.

Return value

This method supports standard return values, as well as the following.

For more information, see ADSI Error Codes.

Remarks

PutEx is usually used to set values on multi-value attributes. Unlike the IADs::Put method, with PutEx, you are not required to get the attribute values before you modify them. However, because PutEx only makes changes to attributes values contained in the ADSI property cache, you must use IADs::SetInfo after each PutEx call in order to commit changes to the directory.

PutEx enables you to append values to an existing set of values in a multi-value attribute using ADS_PROPERTY_APPEND. When you update, append, or delete values to a multi-value attribute, you must use an array.

Active Directory does not accept duplicate values on a multi-valued attribute. If you call PutEx to append a duplicate value to a multi-valued attribute of an Active Directory object, the PutEx call succeeds, but the duplicate value is ignored.

Similarly, if you use PutEx to delete one or more values from a multi-valued property of an Active Directory object, the operation succeeds, that is, it will not produce an error, even if any or all of the specified values are not set on the property.

Note The WinNT provider ignores the value passed by the InControlCode argument and performs the equivalent of an ADS_PROPERTY_UPDATE request when using PutEx.

Examples

The following code example shows how to use the IADs.PutEx method.

Dim x As IADs

On Error GoTo Cleanup

Set x = GetObject("LDAP://CN=JeffSmith,CN=Users,DC=Fabrikam,DC=com")
'----------------------------------------------------------
' Assume the otherHomePhone has the values
' 425-707-9790, 425-707-9791
'----------------------------------------------------------
 
' Adding a value
x.PutEx ADS_PROPERTY_APPEND, "otherhomePhone", Array("425-707-9792")  
x.SetInfo              ' Now the values are 425-707-9790,425-707-9791,425-707-9792. 
deleting two values
x.PutEx ADS_PROPERTY_DELETE, "otherHomePhone", Array("425-707-9790", "425-707-9791")
x.SetInfo              ' Now the values are 425-707-9792.
 
' Changing the remaining value
x.PutEx ADS_PROPERTY_UPDATE, "otherHomePhone", Array("425-707-9793", "425-707-9794")
x.SetInfo              ' Now the values are 425-707-9793,425-707-9794.
 
' Deleting the value
x.PutEx ADS_PROPERTY_CLEAR, "otherHomePhone",  vbNullString
x.SetInfo              ' Now the property has no value.

Cleanup:
    If(Err.Number<>0) Then
        MsgBox("An error has occurred. " & Err.Number)
    End If
    Set x = Nothing

The following code example shows how to use the IADs::PutEx method.

HRESULT hr;
IADs *pADs=NULL;
LPWSTR pszADsPath = L"LDAP://CN=JeffSmith,CN=Users,DC=Fabrikam,DC=com";
 
CoInitialize(NULL);
 
hr = ADsGetObject(pszADsPath, IID_IADs, (void**) &pADs);

if(SUCCEEDED(hr)) 
{
    VARIANT var;
    VariantInit(&var);
     
    LPWSTR pszPhones[] = { L"425-707-9790", L"425-707-9791" };
    DWORD dwNumber = sizeof(pszPhones)/sizeof(LPWSTR);
    hr = ADsBuildVarArrayStr(pszPhones, dwNumber, &var);
    hr = pADs->Put(CComBSTR("otherHomePhone"), var); 
    VariantClear(&var);
    hr = pADs->SetInfo();   // The phone list is now 425-707-9790, 425-707-9791.
     
    // Append another number to the list.
    LPWSTR pszAddPhones[]={L"425-707-9792"};
    hr = ADsBuildVarArrayStr(pszAddPhones, 1, &var);
    hr = pADs->PutEx(ADS_PROPERTY_APPEND, CComBSTR("otherHomePhone"), var);
    hr = pADs->SetInfo();   // The list becomes 
                            // 425-707-9790, 425-707-9791, 425-707-9792.
    VariantClear(&var);
     
    hr = ADsBuildVarArrayStr(pszPhones, dwNumber, &var);
    hr = pADs->PutEx(ADS_PROPERTY_DELETE, CComBSTR("otherHomePhone"), var);
    hr = pADs->SetInfo();  // The list becomes 425-707-9792.
     
    pszPhones[0] = L"425-707-9793";
    pszPhones[1] = L"425-707-9794";
    hr = ADsBuildVarArrayStr(pszPhones, dwNumber, &var);
    hr = pADs->PutEx(ADS_PROPERTY_UPDATE, CComBSTR("otherHomePhone"), var);
    hr = pADs->SetInfo();  // The list becomes 425-707-9793, 425-707-9794.
     
    VariantClear(&var);
    V_VT(&var)=VT_NULL;
    hr = pADs->PutEx(ADS_PROPERTY_CLEAR, CComBSTR("otherHomePhone"), var);
    hr = pADs->SetInfo();  // The list is empty.

    VariantClear(&var);
    pADs->Release();
}

hr = CoUninitialize();

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Target Platform	Windows
Header	iads.h
DLL	Activeds.dll