First you need to contact a nc state trooper recruiter, those can be found by going to http://www.nccrimecontrol.org/Index2.cfm?a=000003,000014,000734,001258,000738,000797
Then after talking to the recruiter as long as your are between 19 and a half and 39 you will be sent to take a polygraph a fitness test and a couple written tests, if you pass all that then you will enter their school