[in] Size of array of HNPacket objects handles (see hPackets parameter).
Means maximal quantity of objects, which hPackets parameter may contain.
Description:
Use QueReturnFreeItems to return free HNPacket objects back to the
queue after it is used by your application.
After QueReturnFreeItems is executed FreeCount [Get] property will be
changed. Also, if another thread was awaiting for QueGetFreeItem(QueGetFreeItems)
function completion, its status will be changed.
After an HNPacket objects is used, these objects must be returned
back to the queue as soon as possible: these objects will be used repeatedly by the adapter connected to
the queue.