How to complete a msdn walkthrough ref: Composite Control

1.In Solution Explorer, right-click ctlClockLib, and then click Build.
2.On the File menu, point to Add, and then click New Project.
3.Add a new Windows Application project to the solution, and name it Test.

The Test project is added to Solution Explorer.

4.In Solution Explorer, right-click the Test project node, and then click Add Reference to display the Add Reference dialog box.
5.Click the tab labeled Projects. The project ctlClockLib will be listed under Project Name. Double-click ctlClockLib to add the reference to the test project.
6.In Solution Explorer, right-click Test, and then click Build.
7.In the Toolbox, expand the ctlClockLib Components node.
8.Double-click ctlAlarmClock to add an instance of ctlAlarmClock to your form.