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IUccSessionParticipant Interface

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Encapsulates a participant member of a session.

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

public interface IUccSessionParticipant : IUnknown
public interface IUccSessionParticipant extends IUnknown
public interface IUccSessionParticipant extends IUnknown

Win32 COM/C++ Syntax

interface IUccSessionParticipant : IUnknown

Creating an instance of IUccSessionParticipant

A local endpoint obtains a new instance of IUccSessionParticipant by calling CreateParticipant on a non-terminated IUccSession instance.

/// <summary>
/// Creates a new session participant with associated
/// context metadata
/// </summary>
/// <param name="pSession">Session to create user in</param>
/// <param name="user">UccUri of remote user to add to session</param>
/// <param name="pContextKey">string property name of additional context property</param>
/// <param name="pContextValue">string value of additional context</param>
/// <param name="pEventSink">class instance to handle session participant events</param>
/// <returns>new session participant</returns>
public IUccSessionParticipant CreateSessionParticipant(
    IUccSession pSession,
    UccUri user,
    string pContextKey,
    string pContextValue,
    _IUccSessionParticipantEvents pEventSink)
    IUccSessionParticipant returnValue = null;
    if (pSession == null)
        throw new ArgumentNullException(
            "session cannot be null");
    if (user == null)
        throw new ArgumentNullException(
            "user cannot be null");
    if (pEventSink == null)
        throw new ArgumentNullException(
            "event sink cannot be null");
        //create a session participant using the passed SIP uri
        UccContext userContext = new UccContext();
        userContext.AddNamedProperty("User", user.User);
        if (pContextKey.Length > 0 && pContextValue.Length > 0)
            userContext.AddNamedProperty(pContextKey, pContextValue);
        returnValue = pSession.CreateParticipant(
    catch (COMException)
    { }
    return returnValue;


Obtaining an Session Participant from an Event

A client receives instances of IUccSessionParticipant when the local endpoint is a partipant in a session. Every session participant including the local endpoint itself is provisioned on the client through the OnParticipantAdded event.

/// <summary>
/// called when a participant is added to current session.
/// advises for both session participant events and more specific
/// session type participant events. 
/// </summary>
/// <param name="pEventSource">session instance where participant is added</param>
/// <param name="pEventData">the newly added session participant</param>
void _IUccSessionParticipantCollectionEvents.OnParticipantAdded(
    IUccSession pEventSource, 
    UccSessionParticipantCollectionEvent pEventData)
    IUccSessionParticipant p = pEventData.Participant;
    if (p.IsLocal == false)
        //add new participant to UI list
        //advise for IuccSessionParticipantEvents
        //advise for session type specific participant events

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