Claude wrote:

Hi!

I want to put a boost::asio::ip::tcp::socket as a private member of my class and then create the object in one of the class methods.

I actually use this code:

class myClass{

private: boost::asio::io_service io_service; boost::asio::ip::tcp::socket s; };

But this code don't work (don't compile). Why?

Wow, one I can answer.. Anyways, I suspect the compile error you're getting is "No default constructor available". The problem is just that, Socket doesn't have an "empty" constructor. The Socket constructor needs an boost::asio::io_service object to work. You can fix your code by adding a constructor that does the initialization, like so: class myClass{ public: myClass() : s(io_service) {} private: boost::asio::io_service io_service; boost::asio::ip::tcp::socket s; }; Hope that helps!