Basic Notepad in Visual Basic .NET

Introduction: This tutorial is on how to make a simple Notepad text editor in Visual Basic .NET. Controls: The controls we will need are; Button, button1, Save File Button, button2, Open File Textbox, textbox1, File Contents Imports: Before we begin, you need to import System.IO to allow our program to read and write to/from files. Put this at the top of your document... Open File: For the open file button, we are first going to create a temporary (using) OpenFileDialog box, and give it some basic properties... We then show the dialog which allows the user to select a file to open. The 'ShowDialog()' function is a call blocking function so the code will pause while the user is selecting a file. Once the file is selected, we first ensure that the user didn't click 'Close' by checking for a null/empty/nothing filename... If it is a valid file, we read the contents to our textbox, 'textbox1'... Save File: To save our file, we use a similar procedure to our open file script. Except we use a SaveFileDialog box instead of an OpenFileDialog box. Filters: We could also limit our user to only saving .txt files by adding filters to our Open/Save FileDialog boxes, like so... (Replace 'fo' with 'fs' for the saving script. Above is the open script.) Finished! Here is the full source code...