HRESULT IDropTargetImpl::DragEnter(IDataObject *pDataObj, DWORD grfKeyState, POINTL ptl, DWORD* pdwEffect)
Notification of drag enter
Defined in: DropTarget.h
Return Value
Returns S_OK if dragging should continue. Returns DRAGDROP_S_CANCELif the dragging should stop. Returns DRAGDROP_S_DROP if it's time to drop the data.
Parameters
*pDataObj
Pointer to a data object
grfKeyState
Flag indicating key state
ptl
current point
pdwEffect
Drop target fills this with the desired state based on the keyboard flags.