THE PLT OF A PAYE WAS UNABLE TO STOP THE ACFT AFTER LNDG ON A WET RWY DURING RAINSHOWERS. THE PLT HAD OBTAINED A VARIETY OF WX RPTS BEFORE LNDG WHICH INDICATED THAT HE HAD CHOSEN THE APPROPRIATE RWY FOR THE WX CONDITIONS.

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I WAS THE PLT OF CHEYENNE IIXL ON AN IFR FLT PLAN FROM BROKEN BOW; NE; TO MILLARD ARPT; OMAHA; NE. AT ABOUT 50 MI FROM MILLARD; I TUNED IN LINCOLN ATIS; OMA ATIS; AND THE MILLARD AWOS. THEN APCHING I AGAIN TUNED IN THE MILLARD AWOS 2 OR 3 TIMES AND DETERMINED THAT WE WOULD LAND ON RWY 30 WITH THE WINDS BEING GENERALLY FROM THE N AT 11 KTS GUSTING TO 19 KTS. I WAS VECTORED BY OMA APCH FOR AN NDB APCH TO RWY 12. I HAD THE NDB TUNED ALONG WITH AN RNAV FIX ON THE ARPT; WHICH FURTHER INDICATED THAT A LNDG ON RWY 30 WAS NECESSARY; AS I HAD A 10-15 KT TAILWIND COMPONENT WITH A 10-15 DEG L CORRECTION. WE BROKE OUT WELL ABOVE CIRCLING MINIMUMS IN LIGHT RAIN; BUT GOOD VISIBILITY. THERE WAS A GREAT DEAL OF TURB AND AS I TURNED FINAL I ALIGNED WITH THE RWY CTRLINE WITH SOME R XWIND CORRECTION. A NORMAL LNDG WAS MADE. UPON ROLLOUT; I TRIED TO APPLY BRAKES TO DECELERATE THE ACFT. THE ACFT BECAME VERY DIFFICULT TO CTL AND AT EACH ATTEMPT TO BRAKE AND USE REVERSE THRUST THE ACFT WOULD START TO SKID. I WAS UNABLE TO ACHIEVE ANY FOOTING (BEST DESCRIBED AS A GREASED OR ICY). AS THE RWY END APCHED; I APPLIED FULL PROPS; REVERSE AND BRAKES. I RAN OFF THE RWY TO THE L CLIPPING A RWY LIGHT WITH THE R PROP. IT WAS RAINING AT THE TIME AND THE RWY WAS WET. LESSON LEARNED: HYDROPLANING; XWIND AND RAIN SLICK RWY CAN CAUSE SEVERE CTL AND BRAKING PROBS.