The following table lists constant values that indicate why an interface is unreachable.
|MPR_INTERFACE_ADMIN_DISABLED||The administrator has disabled the interface.|
|MPR_INTERFACE_CONNECTION_FAILURE||The previous connection attempt failed. Look at the dwLastError member for the error code.|
|MPR_INTERFACE_DIALOUT_HOURS_RESTRICTION||Dial-out is not allowed at the current time.|
|MPR_INTERFACE_OUT_OF_RESOURCES||No ports or devices are available for use.|
|MPR_INTERFACE_SERVICE_PAUSED||The service is paused.|
|MPR_INTERFACE_NO_MEDIA_SENSE||The network cable is disconnected from the network card.|
|MPR_INTERFACE_NO_DEVICE||The network card has been removed from the machine.|