title: User Controls not showing up in the toolbox
body: <p>I have some UserControls that I created in ProjectA.  I have ProjectB that has a windows form that I want to put the controls on.  Both of these projects are in a single solution.  There's a reference to ProjectA from ProjectB so it can "see" the UserControls.</p>
  
  <p>However, the UserControls do not show up in the toolbox for me to drag to the windows form.</p>
  
  <p>I've tried rebuilding.  I've also deleted the 'bin' directory to force a rebuild-all.</p>
  
  <p>How do I get VS2008 to populate the toolbox with my UserControls?</p>