[boost] store a boost::bind

Hi, Is it possible to store a boost::bind? boost::bind<int> x( f, _1, _2 ); int i = x( 3, 4 ); I get errors if i want to declare a variable of type boost::bind. The point is: I want to have an object that gets a boost::bind, stores it and executes it with the correct values to the time i want. How can i do this? Ciao