After landing at the destination airport, the pilot attempted to retract the flaps, but accidently raised the landing gear. As the airplane began to settle, the pilot attempted to extend the gear, but an unable to do so before the airplane collapsed onto the runway and slid along its belly. An examination of the airplane revealed that that the airplane had substantial damage was sustained to the left wing. The pilot reported less than an hour in type, and utilized a technique he had developed to land a different airplane, where the locations of the flap and gear levers were in opposite locations.