Collision question: detecting intersection of collision shapes?

I am trying to figure out, given 2 shapebase objects, whether they are in a state of collision....I need to known if their shapes are overlapping with each other and hence need a function which can just give me a true/false return telling me if the objects are overlapping. If not this, I could do with something that points me to the collision meshes of the objects and a way to test if they are colliding....