Don't wast your time to create sequence diagram using visio or some
Here I found very useful site that generates sequence diagram as per
You have to just type very smple script that should descripe the call
from one class to
another and On click of "Draw" button you can get your secquence diagram
in the form of picture or pdf.
Don't worry about script learning and script notation, it's
very,following site will give you all help and example