Occurs when the user is about to drop cells.
Public Event BeforeDrop As DragDropCancelEventHandler
Grid Object
The following parameters are available:
| Parameter | Description |
| FirstRow | The first row's number when the drop occurs. |
| FirstCol | The first column's number when the drop occurs. |
| LastRow | Ths last row's number when the drop occurs. |
| LastCol | The last column's number when the drop occurs. |
| Cancel | Gets or sets a value indicating whether the operation should be canceled. |