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
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#VBNet #WindowsForms #NumericInput #MessageBox #TextBoxValidation #Programming #VBNetTutorial
