To produce documents, the application creates a CwPrinterShell on the desired printer screen and display. The shell provides methods to start and end print jobs and to identify page boundaries. Text and graphics are drawn on the window associated with the printer shell.

The CwPrinterShell notifies the application of printing events using the widget callback mechanism. The callback model for printing is described in Adding callbacks. See the "Common Widgets" chapter for more information on callbacks.