API UseContainerItem

Uses an item from a container depending on the situation.
 UseContainerItem(bagID, slot [, target[, reagentBankAccessible]])
==Arguments==
:;bagID: - The bag id, where the item to use is located
:;slot: - The slot in the bag, where the item to use is located
:;target: : UnitId - The unit the item should be used on. If omitted, defaults to "target" if a the item must target someone.
:;reagentBankAccessible: - This indicates, for cases where no target is given, if the item reagent bank is accessible (so bank frame is shown and switched to the reagent bank tab).
==Details==
* Slots in the bags are listed from left to right, top to bottom. A 16 slot bag has the following slot numbers:
1 	2 	3 	4
5 	6 	7 	8
9 	10	11	12
13	14	15	16
: A 6 slot bag has the following slot numbers:
 	 	1	2
3	4	5	6
* This function is protected, though may still be called in the following situations:
** When the (Guild/Reagent) Bank is open: Move the item to/from the (Guild/Reagent) Bank.
** When the Merchant frame is open: Sell the item.
** When the Mail frame is open and on the "Send Mail" tab: Add the item to the attachments.
** When the item is equippable: Equip the item.
** When the slot is empty: Do nothing.
** When the item is a locked Lockbox: Show an error message that says it's locked.
** When the item is a container (Clam Shell, Unlocked Lockbox, etc.): Open the Loot frame and show the contents.
** When the item is a book: Open the book's Gossip frame for reading.
** When the item is not a usable item: Do nothing.
** When the item starts a quest: Open the quest Gossip frame for reading.
** When the Trade frame is open: Add the item to the list of items to be traded. (I have not confirmed this)
** When the Auctions tab is open: Add item for auction pricing and submission.
==Patch changes==