i used TF2II_GetItemAttributeValue(Index, attributeSlot);
the return value is so large (over 1000000). i thought because that attribute doesn't need value (like Diamond Back's , The eternal reward's, SAXXY's..) so the value is just a garbage value.
but the attribute that needs value (like The Ambassador's, The Cloak and Dagger's .. they need percentage value right?) also return very large value.
what i'm making now is Get Index's Attributes, values and apply on the other item using handle.
if you need more information i will upload code. sorry for my bad english