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Driver Support for MCI Commands
MCI drivers provide the functionality for MCI commands. The system software
performs some basic data-management tasks, but all the multimedia playback,
presentation, and recording is handled by the individual MCI drivers.
Drivers vary in their support for MCI commands and command flags. Because
multimedia devices can have widely different capabilities, MCI is designed to let
individual drivers extend or reduce the command sets to match the capabilities
of the device. For example, the record (MCI_RECORD) command is part of the command set for MIDI sequencers, but the MCISEQ
driver included with Windows does not support this command. The reference topic for
the record command explains that devices of the sequencer device type recognize the command; this does not mean that all devices of
this type support the command. Applications should use the capability (MCI_GETDEVCAPS) command to determine the capabilities of a particular device.
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Unix Manual Pages
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