Public Overridable Function onGetKeepAlive( _
   ByRef _keepAliveTime As Integer _
) As Integer

public virtual int onGetKeepAlive( 
   out int _keepAliveTime
)

Parameters

_keepAliveTime

The maximum amount of time (in milliseconds) the server sends a new subscription callback since the last subscription callback. A value of zero indicates the server will not send any keep-alive callbacks. If SetKeepAlive() has never been called, the value will be zero

Return Value

Reference