If you want to create a GUI-based application, you need to implement the standard S60 classes, including:
You must implement the classes that allow the S60 platform to launch and manage the application.
You must implement the classes that handle the UI.
You must create the resource files required for your application.
You may want to consider implementing the components that use asynchronous methods in an active object.
Active objects inherit from CActive. For more information, see Using CActive in the Symbian OS Library.
Avkon components are available for displaying your information on the device screen.