How can I link dimension to value inside toolbox editor

Hi,

        I made a copy of a part (a nut) and I added a fonction within that new part. I wish to link dimension to the property inside the toolbox editor, like thickness or something. I tryed to make a property, but you can make an equation with specific configuration but not active configuration, so each time a create a new configuration it takes the same value each time.

               I found the access data base, but it s hard to find something there. I think if I could find the tab of my copied part I could make a copy of it and link it to my new part with new data, but I don t know how to do...

           Does someboby have an idea about that? Thanks a lot.

SolidworksToolbox