Using the On Unload Event to Perform Data Validation When a Form Closes in Microsoft Access

In this Microsoft Access tutorial, I'm going to teach you how to use the On Unload event to perform data validation across multiple records and provide a friendly error message when you go to close a form in Microsoft Access. Freya from Oslo, Norway (a Platinum Member) asks: I have a form where my employees enter a number of job codes for a particular project. Each job code is on a separate record. They have to enter at least five job codes but no more than eight. Is there any way I can check that before they're allowed to close the form? BECOME A MEMBER: YouTube:    / @599cd   or My Site: https://599cd.com/THMember LEARN MORE: On Unload: https://599cd.com/OnUnload PREREQUISITES: Intro to VBA: https://599cd.com/IntroVBA Before Update: https://599cd.com/BeforeUpdate DCount: https://599cd.com/DCount LINKS: Double Double Quotes: https://599cd.com/DoubleDouble RECOMMENDED COURSES: Access Developer Courses: https://599cd.com/Developer FREE TEMPLATE DOWNLOADS: TechHelp Free Templates: https://599cd.com/THFree Blank Template: https://599cd.com/Blank Contact Management: https://599cd.com/Contacts Order Entry & Invoicing: https://599cd.com/Invoicing More Access Templates: https://599cd.com/AccessTemplates ADDITIONAL RESOURCES: FREE Access Beginner Level 1: https://599cd.com/Free1 How to Use Access in 30 Minutes: https://599cd.com/30Minutes $1 Access Level 2: https://599cd.com/1Dollar Donate to my Tip Jar: https://599cd.com/TipJar Get on my Mailing List: https://599cd.com/YTML Contact Me: https://599cd.com/Contact TechHelp: https://599cd.com/TechHelp Consulting Help: https://599cd.com/DevNet Twitter:   / learningaccess   https://en.wikipedia.org/wiki/Microso... https://products.office.com/en-us/access https://microsoft.com/en-us/microsoft... KEYWORDS: access 2016, access 2019, access 2021, access 365, microsoft access, ms access, ms access tutorial, #msaccess, #microsoftaccess, #help, #howto, #tutorial, #learn, #lesson, #training, #database, On Unload Event, Data Validation, Form Closing, Error Messages, Multiple Records, Validation Rules, Friendly Error Message, Form Controls, Records Validation, form close, on close, on unload, Form.Unload QUESTIONS: Please feel free to post your questions or comments below. Thanks.