@loginerror @Daun
Add Work Item adds an item to the Work Queue and the item waits for getting processed
Get Queue Item returns a processable item from the queue and changes with this the status indicating that is now in work, but you dont have control which one you get from pool
add transaction item adds an item changes the status, indicating thats is in process. you can directly continue to work with this item
Get Queue Items let you retrieve item based on different filter criterias
In newer Versions some enhancemets are available as well