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Event handlersWhen an event takes place (e.g. selecting a menu entry, clicking an action button, ...) the AppBasic manager calls a special procedure known as an event handler. If an application wishes to specify how the event is to be handled (responded to) the definition of an appropriate event-handler should be placed in the !RunImage directory. The three fundamental types of event are Toolbox events, Wimp events and the initial event. They each have associated sets of event-handlers.
The application processing menu is popped up by dragging the application onto AppBasic's iconbar icon or double-clicking the application while holding down the Ctrl key. |