return NS_ERROR_NOT_IMPLEMENTED;
nsCOMPtr<nsIViewManager> viewManager; nsresult result = GetViewManager(getter_AddRefs(viewManager)); if (NS_SUCCEEDED(result) && viewManager) { nsIScrollableView *scrollView; result = viewManager->GetRootScrollableView(&scrollView); if (NS_SUCCEEDED(result) && scrollView) { scrollView->ScrollByWhole(!aForward); } } return result;
PresShell::CompleteScroll(PRBool aForward){  return NS_ERROR_NOT_IMPLEMENTED;}