vector snap?

I’m sure it’s there, but I’m trying to grab a vector and stretch it to another vector, and have it autolocate, (or object snap as it’s calle d in autocad), exactly on the vector. The selection/grab is fine, but how do I identify/highlight the vector to attach to? This is probabaly explained somewhere, but I couldn’t seem to find it.
Thanks!

Take a look at http://wiki.blender.org/index.php/Tutorials/Snap .

That is exacly it, BeBraw! Thanks!!