| Constant | Type | Value |
| pv drag column | Long Integer | 2 |
| pv drag content | Long Integer | 6 |
| pv drag plugin | Long Integer | 1 |
| pv drag process | Long Integer | 0 |
| pv drag row | Long Integer | 3 |
| pv drag X offset | Long Integer | 4 |
| pv drag Y offset | Long Integer | 5 |
| pv drop action | Long Integer | 14 |
| pv drop column | Long Integer | 9 |
| pv drop content | Long Integer | 13 |
| pv drop plugin | Long Integer | 8 |
| pv drop process | Long Integer | 7 |
| pv drop row | Long Integer | 10 |
| pv drop X offset | Long Integer | 11 |
| pv drop Y offset | Long Integer | 12 |