Represents a filter used to filter messages.
Pass in null for any parameter you do not wish to filter (or do not pass in such parameters at all).
<static> MessageFilter( [sender], [subject], [moduleId], [version], [isread], [processed] )
| Name | Type | Argument | Description |
| sender | string | (optional) | The sender of the message. |
| subject | string | (optional) | The subject of the message. |
| moduleId | number | (optional) | The associated application module ID. |
| version | number | (optional) | The associated application module verions. |
| isread | boolean | (optional) | The read status. |
| processed | boolean | (optional) | The processed status. |