[boost] How to find all paths with a length in a certain range

I am fairly new to Boost, and not the greatest at C++, but I do have a bit of experience in dealing with graphs in other languages. We currently have some very ugly and inefficient code that effectively builds up a graph structure (DAG), and must calculate all paths with a length between a certain range, say 3-7. I have seen the question asked a few times via Google, but I have seen no solution. I have been tinkering around with different examples, but have yet to come up with anything useful. Would anyone be able to point me in the right direction? Thanks! Birch