return it->QueryInterface(kIStyleSetIID, (void **) aInstancePtrResult);
return it->QueryInterface(NS_GET_IID(nsIStyleSet), (void **) aInstancePtrResult);
NS_NewStyleSet(nsIStyleSet** aInstancePtrResult){  if (aInstancePtrResult == nsnull) {    return NS_ERROR_NULL_POINTER;  }  StyleSetImpl  *it = new StyleSetImpl();  if (nsnull == it) {    return NS_ERROR_OUT_OF_MEMORY;  }  return it->QueryInterface(kIStyleSetIID, (void **) aInstancePtrResult);}