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//0x30 bytes (sizeof)
struct _KWAIT_BLOCK
{
    struct _LIST_ENTRY WaitListEntry;                                       //0x0
    struct _KTHREAD* Thread;                                                //0x10
    VOID* Object;                                                           //0x18
    struct _KWAIT_BLOCK* NextWaitBlock;                                     //0x20
    USHORT WaitKey;                                                         //0x28
    UCHAR WaitType;                                                         //0x2a
    volatile UCHAR BlockState;                                              //0x2b
    LONG SpareLong;                                                         //0x2c
};