The effect you would like to display to the user, usually indicating what would happen if a drop occurred at this point with the selected data. Typically, this is the value returned by the most recent call to CView::OnDragEnter or CView::OnDragOver. It can be one or more of the following:



* DROPEFFECT_NONE A drop would not be allowed.



* DROPEFFECT_COPY A copy operation would be performed.



* DROPEFFECT_MOVE A move operation would be performed.



* DROPEFFECT_LINK A link from the dropped data to the original data would be established.



* DROPEFFECT_SCROLL A drag scroll operation is about to occur or is occurring in the target.

-The effect you would like to display to the user, usually indicating what would happen if a drop occurred at this point with the selected data. Typically, this is the value returned by the most recent call to CView::OnDragEnter or CView::OnDragOver. It can be one or more of the following:



　　* DROPEFFECT_NONE　 A drop would not be allowed.



　　* DROPEFFECT_COPY　 A copy operation would be performed.



　　* DROPEFFECT_MOVE　 A move operation would be performed.



　　* DROPEFFECT_LINK　 A link from the dropped data to the original data would be established.



　　* DROPEFFECT_SCROLL　 A drag scroll operation is about to occur or is occurring in the target.