CBA buttons
The Symbian platform uses Control Button Area (CBA) resources to set the options in the control pane above the softkeys. CBA resources map the text that appears above the softkeys in the control pane with commands that are collected by the event loop of the application framework and delivered to your application for command handling.
The left softkey and right softkey are placed inside the CBA.
You must disable item-specific softkeys.
If there is no highlight then, the left softkey is hidden.
When a mobile device user selects an Options softkey, the application framework displays the Options menu based upon the definitions in the menu bars resources.
Depending upon the requirements of your application, you can either:
CBA buttons are constructed using the Buttons API.