Visual Basic (Usage)	Copy Code
Dim instance As Session Dim name As String Dim publishingInterval As Integer Dim callback As AsyncCallback Dim userData As Object Dim value As IAsyncResult value = instance.BeginAddSubscription(name, publishingInterval, callback, userData)

public IAsyncResult BeginAddSubscription( 
   string name,
   int publishingInterval,
   AsyncCallback callback,
   object userData
)

Parameters

name

The display name of the subscription.

publishingInterval

This interval defines the cyclic rate that the Subscription is being requested to return Notifications to the Client. This interval is expressed in milliseconds. This interval is represented by the publishing timer in the Subscription state table. The negotiated value for this parameter returned in the response is used as the default sampling interval for MonitoredItems assigned to this Subscription. If the requested value is 0 or negative, the server shall revise with the fastest supported publishing interval.

callback

The callback to use when the async call completes.

userData

The user data that is passed to the callback.

Return Value

Target Platforms: Windows 7/8/10, Windows Server 2003/2008/2012/2015, .NET4.x

Reference