Post: #20

From the revisions:

Added: TDATA3 and TDATA4 of a container type item are now holding min and max coordinates of
the "area were items may be placed", relatively to the open container gump.
TDATA3 is (MinX * 0x10000) + MinY, TDATA4 is (MaxX * 0x10000) + MaxY

MaxX and MaxY can be found in Uofiddler under Gump by the checking the size property. MinX and MinY are probably the starting coordinated where you can put an item.