如何在visual basic 6.0中进行开发和构建

I am looking for best practice in building multiple visual basic projects(all dll's).We have multiple projects, and our final deliverable will be a dll.Now, one project uses 2 other projects, and another refers to another project.Should projects reference the vbp files, or the dll? If they reference vbp files, how to build all the projects? I am looking for best practice in building mult