mci-monitor.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
MCI_MONITOR command (Mmsystem.h)	The MCI\_MONITOR command specifies the presentation source. Digital-video devices recognize this command.	b6c476ef-d1a4-477d-a104-dda10be60915	MCI_MONITOR command Windows Multimedia	apiref	MCI_MONITOR	Mmsystem.h	HeaderDef	reference	05/31/2018

MCI_MONITOR command

The MCI_MONITOR command specifies the presentation source. Digital-video devices recognize this command.

To send this command, call the mciSendCommand function with the following parameters.

MCIERROR mciSendCommand(
  MCIDEVICEID wDeviceID, 
  MCI_MONITOR, 
  DWORD dwFlags, 
  (DWORD) (LPMCI_DGV_MONITOR_PARMS) lpMonitor
);

Parameters

wDeviceID

Device identifier of the MCI device that is to receive the command message.

dwFlags

MCI_NOTIFY, MCI_WAIT, or MCI_TEST. For information about these flags, see The Wait, Notify, and Test Flags.

lpMonitor

Pointer to an MCI_DGV_MONITOR_PARMS structure.

Return Value

Returns zero if successful or an error otherwise.

Remarks

The following additional flags apply to digital-video devices:

MCI_DGV_MONITOR_METHOD

A constant indicating the method of monitoring is included in the dwMethod member of the structure identified by lpMonitor.

When the MCI_DGV_MONITOR_INPUT flag is used in the dwSource member, this selects the method of monitoring. Typically, different monitoring methods have different implications on how the hardware is used. The default monitoring method is selected by the device.

MCI_DGV_MONITOR_SOURCE

A constant indicating the monitor source is included in the dwSource member of the structure identified by lpMonitor.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Mmsystem.h (include Windows.h)

See also

MCI

MCI Commands