memory leakage issue (problem in my component)

[Srinivasa Raghavan]

Hi, In my component i had a method like GetWindowForNode(nsIDOMNode *node , nsIDOMWindow **window) NS_IMETHODIMP nsRecorderImpl::GetWindowForNode(nsIDOMNode *node,nsIDOMWindow **window) {     nsresult rv;     nsCOMPtr<nsIDOMDocument> ownerDoc;     rv = node->GetOwnerDocument(getter_AddRefs(ownerDoc));     if(NS_SUCCEEDED(rv) && ownerDoc)     {         nsCOMPtr<nsIDOMDocumentView> docView(do_QueryInterface(ownerDoc,&rv));                 if(!(NS_SUCCEEDED(rv)) || !docView) return NS_ERROR_FAILURE;                 nsCOMPtr<nsIDOMAbstractView> view;         rv = docView->GetDefaultView(getter_AddRefs(view));             if(!(NS_SUCCEEDED(rv)) || !view) return NS_ERROR_FAILURE;         nsCOMPtr<nsIDOMWindowInternal> internal= do_QueryInterface(view,&rv);         if(!(NS_SUCCEEDED(rv)) || !internal) return NS_ERROR_FAILURE;                 nsCOMPtr<nsIDOMWindow> domWindow(do_QueryInterface(internal,&rv));                 if(NS_SUCCEEDED(rv) && domWindow)         {             *window=domWindow;         }         else         {             return NS_ERROR_FAILURE;         }     }     return NS_OK; } I invoked this method as said below nsCOMPtr<nsIDOMWindow> window; rv = GetWindowForNode(node,getter_Addrefs(window)); while invoking the method as said above i am getting memory issue. While the same method is called as nsIDOMWindow *window; rv = GetWindowForNode(node,&window); There is no memory issue. My query is whether it is appropriate to us nsCOMPtr here ? If it is wrong please guide me where to use nsCOMPtr. Please help me in this regard. Thanks & Regards S.Srinivasa Raghavan --