The IEnumZOrdersCallback Interface of the com.ms.directX package is used with DirectDrawSurface.enumOverlayZOrders to set the callback function to be called for each overlay on the given surface.
public interface IEnumZOrdersCallback extends IUnknown { // Methods public void callbackEnumOverlayZOrders(DirectDrawSurface f, IUnknown context); }
IUnknown | +--IEnumZOrdersCallback