Active Directory Programming has become necessary now a days
because Active Directory is now been considered as a standard
across all organizations. In an active directory structure the
objects like computers, users, groups etc., are treated as
object nodes with their own properties and collections. This
article explains how to use the Active Directory Programming
concept to enumerate the users in a local computer.
This Active Directory programming sample uses the objects
IADsContainer and IADsUser and functions like ADsGetObject,
ADsBuildEnumerator and ADsEnumerateNext.
Active
Directory programming - Important interfaces and functions:
IADsContainer:
This Active directory programming interface can be used like a
container to hold the other objects. For example this can be
used to query the list of users and hold it. This can then be
used with enumeration functions to enumerate the objects
queried.
IADsUser:
This IADsUser active directory programming interface is used
to hold the properties of a user of a domain or a local
computer.
ADsGetObject:
This is used to retrieve the object when the right path/ADSI
query is specified.
ADsBuildEnumerator and ADsEnumerateNext:
These two Active directory programming functions are used to
enumerate the collection of objects inside the container.
Active
Directory programming - Sample code to retrieve the list of
users:
The following console based application sample can retrieve
the users present in the local computer.
#include
<comdef.h>
#include <Iads.h>
#include <Adshlp.h>
int main()
{
HRESULT hr;
IADsContainer *pCont = NULL;
CoInitialize(NULL);
hr = ADsGetObject(L"WinNT://domain/computer",
IID_IADsContainer, (void**) &pCont );
if ( !SUCCEEDED(hr) ) { return hr;}
_variant_t var;
IEnumVARIANTPtr pEnum;
ADsBuildEnumerator (pCont,&pEnum);
int cnt=0;
ULONG ulFetched = 0L;
_variant_t vChild;
while((SUCCEEDED(ADsEnumerateNext(pEnum, 1, &vChild, &ulFetched))
&& ulFetched==1))
{
IADsUser* pADs;
hr = V_DISPATCH(&vChild)->QueryInterface(IID_IADsUser,
(void**)&pADs);
if(hr!=S_OK)
break;
BSTR bstrName;
pADs->get_Name(&bstrName);
CString csName=bstrName;
SysFreeString(bstrName);
printf("%s\n",csName);
pADs->Release();
pADs = NULL;
}
// Cleanup.
if ( pCont )
{
pCont->Release();
}
CoUninitialize();
}
The ADsGetObject first retrieves the information of the
objects present in the computer. Then ADsBuildEnumerator is
used to build an enumerator of all the objects.
ADsEnumerateNext can be used to traverse through the list till
it fails to get a IAdsUser object.
Note:
The above program needs to be linked with ActiveDS.lib
Adsiid.lib and MFC Libraries.
