The message time is the time the message is posted, measured in milliseconds, from the time the system is started. Its value is the same as that in the parameter of the QMSG structure.

To calculate time delays between messages, the time of the first message is subtracted from the time of the second message.

Time values do not always increase because the value is the number of milliseconds since the system was started, and the system accumulator for this count can wrap through zero.