Scripting in HFSS and Matlab

Hi everyone , I am trying to make a script in matlab to use HFSS , I red this guide http://www.cadfamily.com/download-pd....scripting.pdf , but I am trying to figure out how HFSS assigns the objects ID faces , someone know some script to find out the ID faces ? because for assign ,for example, a boundary condition you must know the ID face, and if you want automate the process using Matlab you can not check the IDs from HFSS of course. If you have some suggestions please help me ahahah bye

rualex88