How to add watch for smith chart plot in CST 5?

hi there
in CST we can do parameter sweep and along with it we can add watch for some parameters like S, Z, Y etc
i wanted to know that can we add watch for smith chart plot ? if its possible please help to find out how
thanks and regards
-lkminz

which studio do you use,if mws,please note plot tool
PS:
do you mean how to look smith chart when you sweep a param in a simulation task,maybe vba is a method

@ flatcloud
thanks for helping
but i think vba wouldn't help me .
i am using CST 5 . in VBA i found that i can change the frequency setting but i was looking for a way to check the smith chart plot with parameter sweep .. parameters like antenna dimension.
if u use add watch feature in CST ans add watch for S parameter it display all s-parameter plot for all the parameter variation u wanted in only one plot.
i am looking for same thing for smith chart ... in add watch there is option to add some predefined function like s parameter and different function but no smith chart. there is option of user defined ..but there u need to write some code... i thought some might have done some coding and able to see smith chart plot