| − | Some programs let users create "macro" commands, using both menu commands and a [[programming]] language to create routines to save time and perform complex tasks. Microsoft Word and Excel are the two most common such programs, and macro viruses, which use the [[Visual Basic]] language that these programs work with, are very common. They can damage Word or Excel files, and render these applications unusable. In addition, they are cross-platform: many macro viruses affect [[Windows (operating system)|Windows]] and [[Mac OS X]] alike. | + | Some programs let users create "macro" commands, using both menu commands and a [[programming]] language to create routines to save time and perform complex tasks. Microsoft Word and Excel are the two most common such programs, and macro viruses, which use the [[Visual Basic]] language that these programs work with, are very common. They can damage Word or Excel files, and render these applications unusable. In addition, they are cross-platform: many macro viruses affect [[Windows (operating system)|Windows]] and [[Mac OS X]] alike.<ref>http://www.intego.com/malware/</ref> |