Notes

Outline

Event Driven Programming in Visual FoxPro Ted Roche, Senior Consultant

VFP Overview

What to do? Don’t Panic! Hitchhiker’s Guide to the Galaxy Experiment! FoxPro 1.0, 2.0 had learning curves, too The quicker you get to the keyboard, the longer it takes to solve the problem.

Event Driven Programming in Visual FoxPro READ EVENTS CLEAR EVENTS Questions?

Event Driven Programming in Visual FoxPro Okay, there really is a little more to it than that... Visual FoxPro is so granular! 2nd most popular term after Cool!

Agenda Basics: What’s an event? - 10 minutes What Events are there? 20 minutes Which Controls have which Events? 10 minutes Event Firing order - 10 minutes Form’s Inits through Unload Data Environments Q & A

What’s an Event? Events: System-generated New Events cannot be added Methods of the same name fire in response to the event Event Firing Sequence is one of the keys to understanding VFP

What Events are there? Let’s look at our event database Event Frequency Tables

Which controls have which events? (handouts) Nearly all have Init, Error, Destroy Visible controls have Move, Drag, Get/LostFocus Individual controls have specific events

Event Firing Sequence Load: First; accept parameters Init: Innermost outward allows outermost containers to work on contents Destroy: Outermost inward Unload: last; provide return values Event Modeling Tool

Summary Events are what it is all about: interactive, visual interfaces Find the best event to match the sequence of operator action

Where to get more information #1: FoxHelp.Hlp Read The Fine Manuals Read The Fantastic sample code Related sessions: Form Designer – Builders Grids – OOP VFP Classes