|This function is protected, and cannot be called from insecure code while in in combat.
Pick up an action for drag-and-drop.
- actionSlot (number) - The action slot to pick the action up from.
If the slot is empty, nothing happens, otherwise the action from the slot is placed on the cursor, and the slot is filled with whatever action was currently being drag-and-dropped (The slot is emptied if the cursor was empty).
If you wish to empty the cursor without putting the item into another slot, try ClearCursor.