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IUccSubscriber Interface

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Encapsulates subscription acknowledgement functionality for the category instances published by the local user.

Namespace: Microsoft.Office.Interop.UccApi
Assembly: Microsoft.Office.Interop.UccApi (in

public interface IUccSubscriber : IUnknown
public interface IUccSubscriber extends IUnknown
public interface IUccSubscriber extends IUnknown

This interface can be queried from an IUccCategoryInstance object of the "subscribers" category name. When a remote user adds the local user to a subscription as an IUccPresentity object, the local user receives a "subscribers" category instance provided that the local client has subscribed to the "subscribers" category instances as part of the self-subscription to various category context.

Win32 COM/C++ Syntax

interface IUccSubscriber : IUnknown

The following example handles the OnCategoryInstanceAdded event that is raised when a client is provisioned with a subscriber object. The example uses the Acknowledged property to direct the client to display a standard Windows message dialog prompting the local user to add the subscribing user to a contact list. If the local user responds to the MessageBox dialog with either a Yes or a No, the handler sets the Acknowledged flag of the subscriber to True and publishes the subscriber object.

void _IUccCategoryContextEvents.OnCategoryInstanceAdded(
   IUccCategoryContext pCategoryCtx, 
   UccCategoryInstanceEvent pCategory)
   IUccCategoryInstance ci = pCategory.CategoryInstance;
   IUccCategoryContext catContext = pCategory.CategoryInstance.CategoryContext;
   switch (pCategory.CategoryInstance.CategoryContext.Name.ToLower().Trim())
      case "contacts":
      case "groups":
      case "subscribers":
         IUccSubscriber subscribingUser = ci as IUccSubscriber;
         Boolean _acknowledged = false;
         if (subscribingUser.Acknowledged == false)
            DialogResult r = MessageBox.Show(
               subscribingUser.Uri.AddressOfRecord +
               " at " +
               subscribingUser.SourceType.ToString() +
               " has added you as a contact. " +
               System.Environment.NewLine +
               "Do you want to add the user to your contact list?",
               "Subscription Acknowlegement",
            switch (r)
               case DialogResult.Yes:
                  // add remote user as contact
                  _acknowledged = true;
               case DialogResult.No:
                  _acknowledged = true;
            if (_acknowledged == true)
               IUccCategoryInstance subCI = ci.CreatePublishableCategoryInstance();
               IUccSubscriber sub = subCI as IUccSubscriber;
               sub.Acknowledged = true;
               subCI.PublicationOperation = UCC_PUBLICATION_OPERATION_TYPE.UCCPOT_ADD;
               PublishCategoryInstance(subCI, "subscribers");

Development Platforms

Windows XP Professional with Service Pack 2 (SP2), Windows Server 2000 with Service Pack 4, Windows Server 2003, Windows Vista Ultimate Edition, Windows Vista Business Edition, Windows Vista Enterprise Edition

Target Platforms