File list (Check if you may need any files):
ch20_code\229880 Ch20.sln
.........\229880 Ch20.vsmdi
.........\LocalTestRun.testrunconfig
.........\TestingWinFormsApp\Customer.vb
.........\..................\Form1.Designer.vb
.........\..................\Form1.vb
.........\..................\My Project\Application.Designer.vb
.........\..................\..........\Application.myapp
.........\..................\..........\AssemblyInfo.vb
.........\..................\..........\Resources.Designer.vb
.........\..................\..........\Resources.resx
.........\..................\..........\Settings.Designer.vb
.........\..................\..........\Settings.settings
.........\..................\Order.vb
.........\..................\Product.vb
.........\..................\Subscription.vb
.........\..................\TestingWinFormsApp.vbproj
.........\....ProjectWinFormsApp\AuthoringTests.txt
.........\......................\CustomerTest.vb
.........\......................\My Project\AssemblyInfo.vb
.........\......................\OrderTest.vb
.........\......................\ProductTest.vb
.........\......................\SubscriptionTest.vb
.........\......................\Test References\TestingWinFormsApp.accessor
.........\......................\TestProjectWinFormsApp.vbproj
.........\....ingWinFormsApp\My Project
.........\....ProjectWinFormsApp\My Project
.........\......................\Test References
.........\TestingWinFormsApp
.........\TestProjectWinFormsApp
ch20_code