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Office macros are small computer programs that perform tasks on your behalf. And when we say small, we mean very small. A skilled programmer can create a macro that does something meaningful with just a few lines of program code, written in the underlying programming language of Office, Visual Basic for Applications (VBA).
Anyone can create powerful macros using tools built into Word, Excel, and PowerPoint (OneNote does not support the use of macros). But most people never use Office macros. Why? The two most common reasons are