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Events in a runtime Windows application can be: Interface events are essentially to do with user navigation. Examples are clicking a button, leaving a field or closing a window. Data events are user actions that are more directly related to data manipulation. Examples are creating, inserting or deleting a record, or committing or rolling back a transaction. Events are important for customisation, because objects in Windows Designer have event properties where you can write action scripts that will execute when the event occur. Events are closely related with validation routines. For instance, leaving a field is an event that causes the field to be validated if the user has entered or changed the field value. In turn, validation brings domain and table constraints into play. In previous versions of USoft Developer, behavior properties that relate actions to events were referred to as callbacks.
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