This structure is a pointer to a memory stream handler playlist object ACB.
typedef struct _ACB_MEM_PLAYL {
ULONG ulACBLen; /* Structure length. */
ULONG ulObjType; /* Object type. */
PVOID pMemoryAddr; /* Memory object starting address. */
} ACB_MEM_PLAYL;
typedef ACB _ MEM _ PLAYL * PACB _ MEM _ PLAYL ;