Figure 2 COM+ Catalog Object Hierarchy

Figure 4 Event Spy (Partial Listing)

  /*
Import the DLL containing COM+ Catalog Type Library
*/

#import "d:\\winnt\\system32\\com\\comadmin.dll"

/*
Global variables for catalog object and root collection.
*/

COMAdmin::ICOMAdminCatalogPtr g_Catalog ;
COMAdmin::ICatalogCollectionPtr g_CatalogRoot ;

BOOL CRTEventSpyApp::InitInstance()
{

    <initialization omitted> 
/*
Create the COM+ catalog and open the root collection.
*/

    g_Catalog.CreateInstance (
L"ComAdmin.ComAdminCatalog.1") ; 
    g_CatalogRoot = g_Catalog->GetCollection (
        _bstr_t("Root")) ;

    return TRUE;
}

BOOL CChooseEventClassDlg::OnInitDialog() 
{
    CDialog::OnInitDialog();

/*
Get collection of applications from root. 
Populate collection. 
Iterate through applications.
*/
    COMAdmin::ICatalogCollectionPtr Apps ;
    Apps = g_CatalogRoot->GetCollection (
         _bstr_t("Applications"), _variant_t((long)0) ) ;
    Apps->Populate ( ) ;

    int i ;
    for (i = 0 ; i < Apps->Count  ; i++)
    {

/*
From each application, get collection of components 
Populate collection. 
Iterate through components.
*/
        COMAdmin::ICatalogObjectPtr app ;
        app = Apps->GetItem (i) ;

        COMAdmin::ICatalogCollectionPtr Components ;
        Components = Apps->GetCollection (
             _bstr_t("Components"), app->GetKey( )) ;
        Components->Populate ( ) ;

        int j ;
        for (j = 0 ; j < Components->Count ; j++)
        {
            COMAdmin::ICatalogObjectPtr comp ;
            comp = Components->GetItem (j) ;

/*
If component represents an event class, look at its interfaces.
*/
            if (comp->GetValue (
                _bstr_t("IsEventClass")))
            {

                <code omitted for simplicity>
            }
        }
    }
}

Figure 10 Object State Location

Figure 12 Authentication Levels in COM+