Custom Controls in wpf

1.Create a new solution and start with a WPF Custom Control Library. Call it "PopupControlLib".
2.Add a second project of type WPF Application to the solution and call it "PopupControlTest".
3.Add a reference to the custom control library by using the "Add Reference" context menu entry on the "PopupControlTest" project item in the solution explorer.
4.Rename the CustomControl1 to PopupControl.