What is the procedure after installation of a 2001 Honda Civic steering column ignition for the car to recognize the key?

YOU MUST HAVE THE TRANSPONDER KEYS & ECM RESET BY A PROFESSIONAL LOCKSMITH. THEY HAVE TO USE A LIL BOX TO RESET THEM. IT CAN ALSO JUST BE THAT THE NEW,.......ITS A BLACK PLASTIC BOX AROUND THE KEY ( AT THE MOMENT I CANT RECALL THE NAME OF THE BOX,,,, SORRY.) I JUST REUSED THE OLD ONE. I STILL NEEDED TO GET THE E.C.M RESET. IT WAS ABOUT 100 BUCKS. NOT TOOO BAD CONSIDERING IT COSTS 900 DOLLARS TO HAVE THE DEALER DO IT.