The Inv class handles the inventory. It contains the inventory items and
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Sets the global variable gInv to the Inv object.
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Displays a dialog listing the inventory items owned by theOwner.
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Checks if any of the inventory item names have been said. If any have, it returns TRUE, otherwise, FALSE.
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Checks if any of the inventory items are owned by anObject. If any are, it returns TRUE, otherwise, FALSE.