printing material characteristics assigned to class 001

Hi

i am working on printing material characteristics.

i am using vc_I_GET_CONFIGURATION FM to get all the characteristics associated to the material.

now i want to print the changes in the bottom under the label Fields changed/Modified.

if i change any characteristic value(s) and save the form and issue output i need to print the form and bottom i need to print the characteristic that is changed.

may i know how can i capture these fields? my characteristics are assigned to 001 class and hence data is not stored in tables...

let me know if there is any solution to work around...

thanks