If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

VBA is a powerful program that enables non-programmers to create and edit macros. Learn how to enable & use VBA in Microsoft Excel.

VBA sub procedures can perform lots of tasks and there are many ways to execute those functions in Microsoft Excel.

In Word, Excel, or PowerPoint for Windows, open the file you want to protect with a password, then select File and Info.