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//0x18 bytes (sizeof)
struct _KALPC_RESERVE
{
    struct _ALPC_PORT* OwnerPort;                                           //0x0
    struct _ALPC_HANDLE_TABLE* HandleTable;                                 //0x4
    VOID* Handle;                                                           //0x8
    struct _KALPC_MESSAGE* Message;                                         //0xc
    ULONG Size;                                                             //0x10
    LONG Active;                                                            //0x14
};