2.3.12.8 PROPID_MGMT_QUEUE_BYTES_IN_QUEUE
Value: 8
Variant type: VT_UI4
Description: The number of message bytes for all messages in the queue.
Note This property identifier is available only in MSMQ 3.0 and later versions. It replaces PROPID_MGMT_QUEUE_JOURNAL_USED_QUOTA from MSMQ 1.0 and MSMQ 2.0.