________________________________________ From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Philipp Henkel Sent: Thursday, January 04, 2007 12:34 PM To: boost-users@lists.boost.org Subject: [Boost-users] COM and boost::intrusive_ptr 1. I need to access the address of the raw pointer (to use QueryInterface). Therefore I    implemented operator& for intrusive_ptr. Like in COM this pointer-pointer will only    be used for intialization purposes. My implementation relies on the intrusive_ptr's    memory layout and returns reinterpret_cast<T**>(addressof(ptr)). I know, this is evil...    CComPtr-like usage:       boost::intrusive_ptr<IVideo> video;    someObject->QueryInterface(IID_IVideo,(void**)&video);        Is there a better way? How do you bring intrusive_ptr and QueryInterface together? [Nat] Sorry if this is naïve... Wouldn't it work to do something like this? IVideo* temp_video = NULL; someObject->QueryInterface(IID_IVideo, &temp_video); boost::intrusive_ptr<IVideo> video(temp_video);