reserveThe reserve command allocates contiguous disk space for the device instance's workspace. Digital-video devices recognize this command. wsprintf(lpstrCommand, "reserve %s %s %s", lpszDeviceID, lpszReserve,
lpszFlags); Parameters lpszDeviceID Identifier of an MCI device. This identifier or alias is assigned when the device is opened. lpszReserve One or more of the following flags:
||Specifies the drive and directory path (but not the name) of a temporary file
used to hold recorded data. The name of this file is specified by the device.
The temporary file is deleted when the device is closed. If this flag is
omitted, the device specifies the location of the disk space.
||Specifies the approximate amount of disk space to reserve in the workspace.
The duration value is specified in the current time format. The device bases its estimate
of the required disk space on the following parameters: the requested time, the
file format, the video and audio compression algorithm, and the compression
quality values in effect. If setvideo "record" is "off", then space is reserved only for audio. If setaudio "record" is "off", then space is reserved only for video. If both are "off",
or if duration is zero, then no space is reserved and any existing reserved space is
deallocated. If this flag is omitted, the device will use a device-defined default.
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