Hi all, I have upload in Vault the file msf-1.2.2.zip with a new version of multi signature boost::function extension New in this version is a workaround for a rare compile error in MSVC due to a bug in the compiler that requires a using::operator() declaration also in a class where there are no other operator() defined ! I have also added in the examples a runtime object factory, i.e. where the key to query the factory for an object of a chosen class is a runtime variable, not a compile time constant or something similar. Factory allows to pass any number and type of arguments to ctor of the chosen class. Functionality is similar to factory_24_2_08.zip already in Vault, but this time I've used all the arsenal of boost, namely: fusion, switch (in sandbox, the Vault version is broken), mpl and of course the multi signature function (MSF) that is the core of the factory. Due to this I think the implementation is the most minimal, clean and simple that I know. A peculiarity of this implementation is that MSF uses its polymorphic function object support to bind c'tors wrappers in a naturally and very clean way. This is a good example of how it is possible to take advantage of polymorphic function support in real code. Thanks Marco