public IAsyncResult BeginGetReportParameters(string Report, string HistoryID, bool ForRendering, ParameterValue[] Values, DataSourceCredentials[] Credentials, AsyncCallback callback, object asyncState)

Public Function BeginGetReportParameters(Report As String, HistoryID As String, ForRendering As Boolean, Values As ParameterValue(), Credentials As DataSourceCredentials(), callback As AsyncCallback, asyncState As Object) As IAsyncResult