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MCI_UPDATE
The MCI_UPDATE command updates the display rectangle. Digital-video devices recognize this
command.
MCIERROR mciSendCommand(MCIDEVICEID wDeviceID, MCI_UPDATE,
DWORD dwFlags, (DWORD) (LPMCI_GENERIC_PARMS) lpDest);
Parameters
wDeviceID
Device identifier of the MCI device that is to receive the command message.
dwFlags
MCI_NOTIFY, MCI_WAIT, or, for digital-video devices, MCI_TEST. For information
about these flags, see The Wait, Notify, and Test Flags.
lpDest
Address of an MCI_GENERIC_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 are used with the digitalvideo device type:
MCI_DGV_UPDATE_HDC
The hDC member of the structure identified by lpDest contains a valid window of the DC to paint. This flag is required.
MCI_DGV_RECT
The rc member of the structure identified by lpUnfreeze contains a valid display rectangle. The rectangle specifies the clipping
rectangle relative to the client rectangle.
MCI_DGV_UPDATE_PAINT
An application uses this flag when it receives a WM_PAINT message that is intended for a display DC. A frame-buffer device usually
paints the key color. If the display device does not have a frame buffer, it might
ignore the MCI_UPDATE command when the MCI_DGV_UPDATE_PAINT flag is used because the display will
be repainted during the playback operation.
For digital-video devices, the lpDest parameter points to an MCI_DGV_UPDATE_PARMS structure.
See Also
MCI_DGV_UPDATE_PARMS, MCI_GENERIC_PARMS
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