When Harry announced that they were close, Draco turned away abruptly - not to search for the diadem, but to hide his own reaction at their prolonged contact. Any feeling that was less than positive was obliterated however, when he carefully lifted the diadem from its perch, and he exchanged triumphant grins with Harry. He was still riding this high as they made their way out of the room, and Harry teasingly caught the diadem and pulled it out of his grasp.