return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue), (void **)&aValue);
return CallQueryInterface(val, aValue);
nsComputedDOMStyle::GetMarginWidthFor(PRUint8 aSide,                                      nsIFrame *aFrame,                                      nsIDOMCSSPrimitiveValue*& aValue){  nsROCSSPrimitiveValue* val=GetROCSSPrimitiveValue();  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);  nscoord width = GetMarginWidthCoordFor(aSide, aFrame);  val->SetTwips(width);  return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue),                             (void **)&aValue);}