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OLEStartDrag Event

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Occurs when the OLEDrag method is called.

PROCEDURE Object.OLEStartDrag
LPARAMETERS oDataObject, nEffect

Property Values

  • 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.

See Also

OLE Drag-and-Drop Overview | OLEDrag Method | OLEDragMode Property | NODEFAULT Command

Applies To: CheckBox | ComboBox | CommandButton | CommandGroup | Container Object | Control Object | EditBox | Form | Grid | Image | Label | Line | ListBox | OptionButton | OptionGroup | Page | PageFrame | Shape | Spinner | TextBox | ToolBar