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//0x18 bytes (sizeof)
struct _KAPC_STATE
{
    struct _LIST_ENTRY ApcListHead[2];                                      //0x0
    struct _KPROCESS* Process;                                              //0x10
    UCHAR KernelApcInProgress;                                              //0x14
    UCHAR KernelApcPending;                                                 //0x15
    UCHAR UserApcPending;                                                   //0x16
};