Changer Drivers

This section contains the following information:

System-Supplied Changer Drivers

Vendor-Supplied Changer Drivers

Storing Device-Specific Information in the Changer's Device Extension

Processing Changer Device-Control Requests

A changer driver controls the elements of a media library, or changer (sometimes called an autoloader, autochanger, or jukebox). In NT-based operating systems, a driver for a changer consists of the following:

  • A system-supplied changer class driver provided as a library, mcd.lib, that provides functionality common to all changer drivers

  • A device-specific miniclass driver, statically linked to mcd.lib, that provides routines called by the changer class driver to support a particular type of changer

This section contains guidelines for writing a new changer miniclass driver.