ACFT LANDED WITHOUT TWR CLRNC.

Narrative

IND APCH CTL HAD ME ON A R DOWNWIND FOR RWY 23R DSNDING TO 4000 FT. I RPTED I STILL HAD THE ARPT IN SIGHT AND HE TOLD ME TO DSND TO 3500 FT AND WOULD HAVE THE VISUAL APCH SHORTLY. AT THIS POINT I WAS DSNDING AND WAS DOWN TO ABOUT 5000 FT. HE DID VERY SHORTLY GIVE ME A R TURN TO 140 DEGS AND CLRED ME FOR THE VISUAL. I WAS ON A BASE LEG ABOUT 4 - 4 1/2 MI OUT AT 3500 FT IN MODERATE TURB; TRYING TO KEEP THE PLANE AT VA AND GET THE GEAR AND FLAPS DOWN. TO MAKE MATTERS WORSE WHEN I TURNED FINAL; I TURNED INTO THE SUN AND THE HAZE MADE VISIBILITY A LITTLE WORSE. I HAD AN EXTREMELY STEEP DSCNT ALL THE WAY TO THE RWY. IT WASN'T UNTIL I WAS TURNING OFF THE RWY THAT I REALIZED I WAS STILL ON APCH CTL. LOOKING BACK; I CANNOT REMEMBER APCH TELLING ME TO GO TO TWR -- NO EXCUSE -- BUT IT PROBABLY WOULD HAVE REMINDED ME. I LEARNED HOW TO FLY OUT OF THIS ARPT 5 YRS AGO AND HAVE NEVER HAD ANY PROB COMMUNICATING WITH ATC -- I ALWAYS REMEMBERED -- I WAS TAUGHT THAT WAY. I GUESS I BECAME COMPLACENT AND WITH THE HIGH WORK LOAD I WAS UNDER (I'VE BEEN IN WORSE SITS BY FAR) I SIMPLY FORGOT TO SWITCH TO TWR. IT WAS STUPID AND THERE IS NO EXCUSE!! I AM SURE THIS HAS SCARED ME ENOUGH TO KNOCK ANY COMPLACENCY RIGHT OUT OF ME!