Professional Excel Business Solutions.
Affordable Solutions is an independent consultancy based in Soignies, Belgium, owned and run by Hervé Hanuise, specialising in application development using the Microsoft Office suite.
Hervé has a M.Sc. in Engineering, Economics and Management, providing a unique blend of both business and technical skills.
He is one of a handful of people worldwide to have a good 40 years of expertise with his Excel skills.
Affordable Solutions aims to provide a number of helpful and interesting utilities, examples, tips and techniques to help in your use of Excel and development of Excel solutions.
Please read this page : https://support.office.com/en-us/article/more-on-data-validation-f38dee73-9900-4ca6-9301-8a5f6e1f0c4c
so as to fully understand this method used for data validation
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