Spell Check Tool in Visual Basic

Introduction: This tutorial is on how to create a spell check tool in Visual Basic. Dictionary: First we need to get a dictionary of some sort, I am just going to create a simple text dictionary by opening a new Notepad document and typing: they're their there Note; we put one word per line so we can easily distinguish which words are which later on within our program. You should be able to download a dictionary document from somewhere else online. Design: Our program is going to have two components; Button, button1, To start the spell check function. Textbox, textbox1, To contain the words to spell check. Reading the Dictionary: Before we can check the word spelling, we need something to check it against. So first we create a new string list to contain the dictionary words, this is globally available so don't declare it within a sub/process/function... Then we open a new file reading stream using StreamReader within the System.IO package to the dictionary .txt file we created/downloaded/saved earlier, followed by adding each line (since we put one word per line) to the dictionary words string list... We put this process in the form load sub so that the dictionary file is read once the program is loaded and ready to go. Spell Check Function: Now we need to create a simple spell check function on the button1 click sub. This function will split the text contained within the textbox1 component by a space (" ") so we get each word within our document then we can check each one. So once we have the words as a string array, we iterate through each word and see if it is in our dictionary string array, if not, we output a simple messagebox saying that it is possibly spelt wrong - of course, it might be a noun which would not be in the dictionary and so it could still be spelt right... Note: If you wanted to make this tool portable, instead of hardcoding the dictionary .txt file path in to the program, you could ask the user to open the document through a new openfiledialog box, like so...