An indicator that specifies whether to remove the
first element in the queue or the queue element that was previously examined
by DosPeekQueue.
Possible values are shown in the following list:
This field is set to 0 by the application to indicate
"remove the first element in the queue," according to the order that was
specified when the queue was created (FIFO, LIFO, or priority).
Any other value
The field is set to the value that
was returned by a previous DosPeekQueue
operation to indicate "remove the element that was examined by DosPeekQueue."