[mci extensions] Section Settings The [mci extensions] section contains settings that associate different types of media files with different Media Control Interface (MCI) device drivers. Whenever a media file is selected, Windows uses the associated driver to play it. The [mci extensions] section can contain one or more occurrences of the following setting. ____________________________________________________________ = Purpose: Associates files that have the specified extension with the specified MCI device driver. Windows uses the specified driver to play the media file associated with it. To change: Use Notepad to edit the WIN.INI file. ____________________________________________________________ .