ConferenceSession.BeginLockConference Method (LockConferenceOptions, AsyncCallback, Object)
Locks the joined conference.
Namespace: Microsoft.Rtc.Collaboration
Assembly: Microsoft.Rtc.Collaboration (in Microsoft.Rtc.Collaboration.dll)
Syntax
'Declaration
Public Function BeginLockConference ( _
options As LockConferenceOptions, _
userCallback As AsyncCallback, _
state As Object _
) As IAsyncResult
'Usage
Dim instance As ConferenceSession
Dim options As LockConferenceOptions
Dim userCallback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginLockConference(options, _
userCallback, state)
public IAsyncResult BeginLockConference(
LockConferenceOptions options,
AsyncCallback userCallback,
Object state
)
Parameters
- options
Type: Microsoft.Rtc.Collaboration.LockConferenceOptions
Options to customize locking the conference.
- userCallback
Type: System.AsyncCallback
The method to be called when the asynchronous operation is completed.
- state
Type: System.Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.
Return Value
Type: System.IAsyncResult
An IAsyncResult that references the asynchronous operation.
Exceptions
| Exception | Condition |
|---|---|
| InvalidOperationException | Thrown when the operation is not valid at the given conference session state. |
Remarks
This operation is allowed by the server for conference leaders only. Any attendees joining a conference after it gets locked are placed into the conference lobby. Participants placed in the conference lobby are not visible to applications built on UCMA 2.0. However, if admitted into the conference by a conference leader, they become visible to the application.