Enumerates the subkeys of the specified open registry key.The function retrieves information about one subkey each time it is called.

函数用于枚举一已打开的子,调用函数将返回一子的信息.

DES algorithm decryption process is the same, the only difference is that the first iteration used Subkey K15, K14 ,......, second last with K0, the algorithm itself without any change.

DES算法的程是一样的，区别仅仅在于第一迭代时用子钥K15，第二K14、......，最后一用K0，算法本身并没有任何变化。