Prolem in method finding

Apr 19 2011 4:26 AM

hi

http://www.youtube.com/watch?v=xhYyHxJO1to&feature=relmfu

i am seeing this video but in this video he is using roles class method Adduerotrole but my question is that is this method is built in are this is user define are i am missing namespace can any one help me...?