IDragSourceHelper struct IDragSourceHelper : IVTable<IDragSourceHelper, Vtbl>, IVTable, IComIID Documentation Code public static void PopulateVTable(Vtbl* vtable) public uint AddRef() public HRESULT InitializeFromBitmap(SHDRAGIMAGE* pshdi, IDataObject* pDataObject) Initializes the drag-image manager for a windowless control. public HRESULT InitializeFromWindow(HWND hwnd, Point* ppt, IDataObject* pDataObject) Initializes the drag-image manager for a control with a window. public HRESULT QueryInterface(Guid* riid, Void** ppvObject) public uint Release()