[OperationContract(AsyncPattern = true, Action = "http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/FindString", ReplyAction = "*")]
IAsyncResult BeginFindString(FindStringRequest request, AsyncCallback callback, object asyncState)
<OperationContract(AsyncPattern:=True, Action:="http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/FindString", ReplyAction:="*")>
Function BeginFindString(request As FindStringRequest, callback As AsyncCallback, asyncState As Object) As IAsyncResult