Hi, Maybe it is a naive question, but I've been researching a little and couldnt find an answer to this(not an affirmative and nor negative): Is it possible to have such usages: SOME_MACRO(hello world) or SOME_MACRO("hello world") (or something that doesnt have much "characters overhead", like using space for every character) and have the expansion result in this: h e l l o w o r l d or even better: 'h','e','l','l','o', ' ', 'w', 'o', 'r', 'l', 'd' Well, what I'm trying to find is if it is possible to give something to a macro and the macro create an vector_c with all the characters inside it. Like: SOME_MACRO(Hello World) and expand to: boost::mpl::vector<char, 'H','e','l','l','o',' ','W','o','r','l','d'> Thanks in advance, -- Felipe Magno de Almeida Developer from synergy and Computer Science student from State University of Campinas(UNICAMP). Unicamp: http://www.ic.unicamp.br Synergy: http://www.synergy.com.br "There is no dark side of the moon really. Matter of fact it's all dark."