HRESULT IDropTargetImpl::DragOver(DWORD grfKeyState, POINTL ptl, DWORD* pdwEffect)
Notification of drag over
Defined in: DropTarget.h
Return Value
Returns S_OK if dragging
Parameters
grfKeyState
Flag indicating key state
ptl
current point
pdwEffect
Drop target fills this with the desired state based on the keyboard flags.