Trent,
You need to first place your BOs in a BO library, then your Win and Web forms projects will reference the same BO library.... When you do this, you will want to use a solution, not just a project. When you do this, you can use a project reference and it will appear.
Thanks for the quick reply, especially on a Sunday. I'm trying to do this, and as far as I can tell, am doing the same steps as the Tutorial, but when I get to the Add Reference / Project tab, my BO library is not visible to be selected. In fact, no projects are shown in this tab at all.
Is there anything that I need to do to make a project available or visible to others? It seems odd that my Add Reference / Projects tab is completely blank, even though I've created several test SF projects of various sorts.
PS: I've attached a jpg of the step in the Tutorial where I am stuck... FWIW.
Larry