Callback for a Requestor for the completion of an asynchronous operation.
This callback may be NULL to ignore notification of completion.
- Parameters
-
| self | The callback object. This will never be NULL. |
| operation | The original request operation. This will never be NULL. |
| except | An exception causing the completion of the Operation. If NULL, no exception occurred (the operation completed normally). A DOFEXCEPTION_TIMEOUT will occur only if no results were received. |
