You cannot do spell check on Wordpad. It is just for editing purposes. But I have a suggestion. If you are going to use WordPad. Type your document in Wordpad and when you are finished highlight the entire document then copy and paste it into Microsoft Word and do the spell check there. But this is double the work. Why not just type it in Microsoft Word.

WordPad is a basic word processor that is included in Windows. A word processor is a computer program that you can use to create, edit, view, and print text documents. With WordPad, you can type letters, book reports, and other simple documents. You can also change how the text looks, quickly move sentences and paragraphs around, and copy and paste text within and between documents.

There are four main parts of the WordPad window: (1) The toolbar. The toolbar contains buttons for basic commands, including saving and printing. . (2) The format bar. The format bar contains buttons that you can use to format the text in your document. For example, you can choose the font, color, and alignment of your text. (3) The ruler. Use the ruler to check the layout and placement of text in your document. (4)The document area. This is where you type your document, make changes to the text, and apply your formatting.