DOCM file format is a extended version of DOCX format that supports macros. DCOM file is a text document file used by Microsoft Office suite. The file stores data in XML format. Macros allow users to automate repetitive tasks, calcualtions, or formatting settings to save time.

DOCM macros can be activated using keyboard shortcuts. Macro recording features is available in Microsoft Office Word 2007. More advanced user can crated their own macros using object-oriented and event-driven Visual Basic porgramming language.