The following table lists the codes for the Event parameter.
| Value | Event |
| -1 | All Events |
| 0 | No Events |
| 1 | Area creation |
| 2 | Area deletion |
| 4 | Area activated (clicked or brought to the front) |
| 8 | Area deactivated (area is no longer active) |
| 16 | Object creation (create, paste, duplicate) |
| 32 | Object deletion (delete, cut, clear) |
| 64 | Command-Click (Macintosh) or Ctrl-Click (Windows), |
| not necessarily on object |
| 128 | Object Moved (nudge, alignment, move, etc.) |
| 256 | Object Resized (arrow keys, drag, etc.) |
| 512 | Object Rotated |
| 1024 | Change in selected object(s) |
| 2043 | Double-click |
| 4096 | Reshaping of an object |
| This event occurs when you reshape a polygon, line or arc; |
| smooth or unsmooth it; or add or delete a polygon vertex. |
