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MCI_PLAY
The MCI_PLAY command signals the device to begin transmitting output data. CD audio,
digital-video, MIDI sequencer, videodisc, VCR, and waveform-audio devices recognize
this command.
MCIERROR mciSendCommand(MCIDEVICEID wDeviceID, MCI_PLAY,
DWORD dwFlags, (DWORD) (LPMCI_PLAY_PARMS ) lpPlay);
Parameters
wDeviceID
Device identifier of the MCI device that is to receive the command message.
dwFlags
MCI_NOTIFY, MCI_WAIT, or, for digital-video and VCR devices, MCI_TEST. For
information about these flags, see The Wait, Notify, and Test Flags.
lpPlay
Address of an MCI_PLAY_PARMS structure. (Devices with extended command sets might replace this structure
with a device-specific structure.)
Return Values
Returns zero if successful or an error otherwise.
Remarks
The following additional flags apply to all devices supporting MCI_PLAY:
MCI_FROM
A starting location is included in the dwFrom member of the structure identified by lpPlay. The units assigned to the position values are specified with the
MCI_SET_TIME_FORMAT flag of the MCI_SET command. If MCI_FROM is not specified, the starting location defaults to the
current position.
MCI_TO
An ending location is included in the dwTo member of the structure identified by lpPlay. The units assigned to the position values are specified with the
MCI_SET_TIME_FORMAT flag of MCI_SET. If MCI_TO is not specified, the ending location defaults to the end of the
media.
The following additional flags are used with the digitalvideo device type:
MCI_DGV_PLAY_REPEAT
Playback should start again at the beginning when the end of the content is
reached.
MCI_DGV_PLAY_REVERSE
Playback should occur in reverse.
MCI_MCIAVI_PLAY_WINDOW
Playback should occur in the window associated with a device instance (the
default). (This flag is specific to MCIAVI.DRV.)
MCI_MCIAVI_PLAY_FULLSCREEN
Playback should use a full-screen display. Use this flag only when playing
compressed or 8-bit files.
For digital-video devices, lpPlay points to an MCI_DGV_PLAY_PARMS structure.
The following additional flags are used with the vcr device type:
MCI_VCR_PLAY_AT
The dwAt member of the structure identified by lpPlay contains a time when the entire command begins, or if the device is cued,
when the device reaches the from position given by the MCI_CUE command.
MCI_VCR_PLAY_REVERSE
Playback should occur in reverse.
MCI_VCR_PLAY_SCAN
Playback should be as fast as possible while maintaining video output.
For VCR devices, lpPlay points to an MCI_VCR_PLAY_PARMS structure.
The following additional flags are used with the videodisc device type:
MCI_VD_PLAY_FAST
Play fast.
MCI_VD_PLAY_REVERSE
Play in reverse.
MCI_VD_PLAY_SCAN
Scan quickly.
MCI_VD_PLAY_SLOW
Play slowly.
MCI_VD_PLAY_SPEED
The play speed is included in the dwSpeed member in the structure identified by lpPlay.
See Also
MCI_CUE, MCI_DGV_PLAY_PARMS, MCI_PLAY_PARMS, MCI_SET, MCI_VCR_PLAY_PARMS, MCI_VD_PLAY_PARMS
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