InstantMessagingCall.BeginEstablish Method (ToastMessage, CallEstablishOptions, AsyncCallback, Object)

Begins the operation of establishing the instant messaging call on existing Conversation.

Namespace:  Microsoft.Rtc.Collaboration
Assembly:  Microsoft.Rtc.Collaboration (in Microsoft.Rtc.Collaboration.dll)

Syntax

'Declaration
Public Function BeginEstablish ( _
    toastMessage As ToastMessage, _
    options As CallEstablishOptions, _
    userCallback As AsyncCallback, _
    state As Object _
) As IAsyncResult
'Usage
Dim instance As InstantMessagingCall
Dim toastMessage As ToastMessage
Dim options As CallEstablishOptions
Dim userCallback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult

returnValue = instance.BeginEstablish(toastMessage, _
    options, userCallback, state)

public IAsyncResult BeginEstablish(
    ToastMessage toastMessage,
    CallEstablishOptions options,
    AsyncCallback userCallback,
    Object state
)

Parameters

• toastMessage
  Type: Microsoft.Rtc.Collaboration.ToastMessage
  A short message which can be displayed to the recipient upon receipt. Can be null.

• options
  Type: Microsoft.Rtc.Collaboration.CallEstablishOptions
  Optional parameters to establish the call.

• 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

Remarks

toastMessage specifies the message that is displayed on the client when the callee is notified of an incoming call.

See Also

Reference

InstantMessagingCall Class

InstantMessagingCall Members

BeginEstablish Overload

Microsoft.Rtc.Collaboration Namespace