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//0x300 bytes (sizeof)
struct _ALPC_COMPLETION_LIST_HEADER
{
    ULONGLONG StartMagic;                                                   //0x0
    ULONG TotalSize;                                                        //0x8
    ULONG ListOffset;                                                       //0xc
    ULONG ListSize;                                                         //0x10
    ULONG BitmapOffset;                                                     //0x14
    ULONG BitmapSize;                                                       //0x18
    ULONG DataOffset;                                                       //0x1c
    ULONG DataSize;                                                         //0x20
    ULONG AttributeFlags;                                                   //0x24
    ULONG AttributeSize;                                                    //0x28
    struct _ALPC_COMPLETION_LIST_STATE State;                               //0x80
    volatile ULONG LastMessageId;                                           //0x88
    volatile ULONG LastCallbackId;                                          //0x8c
    volatile ULONG PostCount;                                               //0x100
    volatile ULONG ReturnCount;                                             //0x180
    volatile ULONG LogSequenceNumber;                                       //0x200
    struct _RTL_SRWLOCK UserLock;                                           //0x280
    ULONGLONG EndMagic;                                                     //0x288
};