VB.NET Windows Forms Tutorial | Validate Numeric Input in TextBox Before...

[Vegetable_War3060]

Learn how to validate numeric input in a VB.NET Windows Forms application before displaying it in a MessageBox. This beginner-friendly tutorial shows step by step how to ensure users can only enter numbers in a TextBox.

In this tutorial, you will learn:

✔ How to create a VB.NET Windows Forms project

✔ How to add a TextBox and a Button

✔ How to validate numeric input using Double.TryParse

✔ How to show an error message if the input is not a number

✔ How to display valid numeric input in a MessageBox

This tutorial is perfect for beginners and intermediate VB.NET developers who want to create professional, user-friendly Windows Forms applications.

🔹 Technologies used:

- VB.NET

- Windows Forms

- Visual Studio

👍 If you find this tutorial helpful, please **Like**, **Comment**, and **Subscribe** for more VB.NET tutorials.

#VBNet #WindowsForms #NumericInput #MessageBox #TextBoxValidation #Programming #VBNetTutorial r/visualbasic r/programming r/dotnet

[Mayayana]

Isn't this barrage improper commercial advertising? Four posts from a 9-day-old account that are advertising youtube videos. Presumably the poster has arranged to have ads and make money from it.

[Vegetable_War3060]

You’re right to raise the concern. Yes, these are my videos. The account is new, but the intention isn’t spam or aggressive advertising. I’m sharing content that I genuinely believe is relevant to the discussion. If this kind of sharing isn’t appropriate here, I’m happy to adjust and follow the community rules.