Creates a new device-added message. The device-added message is produced by #GstDeviceProvider or a #GstDeviceMonitor. They announce the appearance of monitored devices.
The #GstObject that created the message
The new #GstDevice
Return: a newly allocated #GstMessage
ConstructionException GTK+ fails to create the object.
1.4
See Implementation
Creates a new device-added message. The device-added message is produced by #GstDeviceProvider or a #GstDeviceMonitor. They announce the appearance of monitored devices.