Is your shapefile consisting of points, lines, or polygons? Which CAD program are you wanting to create "blocks" in? If using AutoCAD, maybe try this link?
I am not totally sure since I do not use AutoCAD that much.
Thanks for the reply. I have the shapefile imported to cad and now I want to convert the points into cad blocks so they look like a valve and not just a dot……. The shapefile consists of points
So are you using AutoCAD? And are you wanting to change the symbology of the point into a valve-like icon? Does this help?