This presentation will give an overview of typical patterns used in ABL legacy applications and how code using those patterns can be moved to PASOE so that it can be consumed from AppServer clients such as the ABL client or web applications. See how you can move validation code from your triggers and how to enable the AppServer to execute validations and provide instructions to the user interface such as enabling or disabling fields, changing values or styling of fields in response to a server-side user-interface trigger.