 Bottom | The widget's bottom position. |
| EventType | The event type, specifying the action performed on the widget. |
| Form | User-specified form for a widget. |
| Left | The widget's left position. |
| Right | The widget's right position. |
| Top | The widget's top position. |
| WidgetType | The type of the widget. |
| WidgetUID | The unique ID of the widget. |