The weather was below VFR minimums, with ceilings between 400 and 800 feet, so Hiel said, "if you need IFR services, click your mic twice." He heard two clicks. Hiel then instructed the pilot to squawk 0303 for radar identification. Soon the aircraft was radar identified and its position was known. Hiel continued with a series of questions to find out where the pilot wanted to land, each question answered with clicks. Once Hiel discovered the pilot wanted to land at Norman, Oklahoma, he issued an IFR clearance, provided weather information and coordinated with other controllers to arrange for vectors to an ILS approach into Norman.