typedef struct _ALPC_COMPLETION_PACKET_LOOKASIDE
{
    unsigned __int64 Lock;
    unsigned long Size;
    unsigned long ActiveCount;
    unsigned long PendingNullCount;
    unsigned long PendingCheckCompletionListCount;
    unsigned long PendingDelete;
    SINGLE_LIST_ENTRY FreeListHead;
    void *CompletionPort;
    void *CompletionKey;
    ALPC_COMPLETION_PACKET_LOOKASIDE_ENTRY Entry[1];
} ALPC_COMPLETION_PACKET_LOOKASIDE, *PALPC_COMPLETION_PACKET_LOOKASIDE;