@kmishu96 The first thing is u need to record the http request from hotmail signup page till finish, and use the http record/sniff result, its not easy bcoz microsoft/hotmail have much protection etc. or u sniff all request from another sniff program and put into BAS :)
Each asynchronous function started, starts in separate thread.
So in that example you will have 2 threads since 2 asynchronous functions
will be started, each with its own (different) script.