WM_APCSYSMSG_MEDIASTATECHANGE

This message is sent when the state of a media device changes.

Parameters

wParam

The high-order word contains the media type. It is one of the following values:

Media type	Value
APC_MEDIATYPE_CD	1

The low-order word contains the notification flags. It may be a combination of the following values:

Notification flag	Value
APC_FLAG_MEDIAINSERT	0x0001
APC_FLAG_MEDIAHASAUDIO	0x0010
APC_FLAG_MEDIAHASDATA	0x0020

lParam

The high-order word contains the device generating the notification. It is one of the following values:

Device generating notification	Value
APC_MEDIADEVICE_DASHCD	0
APC_MEDIADEVICE_CHANGER1	1
APC_MEDIADEVICE_CHANGER2	2
APC_MEDIADEVICE_CHANGER3	3
APC_MEDIADEVICE_CHANGER4	4

The low-order word contains device-specific information.

See Also

HIWORD, LOWORD