Occurs when the OLEDrag method is called.
Syntax
PROCEDURE Object.OLEStartDrag
LPARAMETERS oDataObject, nEffect
Settings
oDataObject
An object reference to OLE drag-and-drop DataObject. You can call any of the DataObject methods from within the OLEStartDrag event.
nEffect
The OLE drag operations supported by the drag source. The following table lists the values for nEffect with a description of each action. nEffect is an output parameter and is set to three on entry into event, so you should provide the value for nEffect in this event. For example, to allow only copy operations, set nEffect to 1 (DROPEFFECT_COPY).
| nEffect | Foxpro.h constant | Description |
| 0 | DROPEFFECT_NONE | Drag source did not support any drag operations. |
| 1 | DROPEFFECT_COPY | Drag source supports Copy operations. |
| 2 | DROPEFFECT_MOVE | Drag source supports Move operations (the default). |
| 4 | DROPEFFECT_LINK | Drag source supports link operations. |
A drag source can support multiple drag operations by adding multiple values together for nEffect. For example, if nEffect is 3, the drag source supports both copy and move drag operations (3 = 1 (copy) + 2 (move)).
Remarks
OLEStartDrag is a drag source event. Including NODEFAULT has no effect on the behavior of this method.