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//0x20 bytes (sizeof)
struct _VI_POOL_ENTRY
{
    union
    {
        struct _VI_POOL_PAGE_HEADER PageHeader;                             //0x0
        struct _VI_POOL_ENTRY_INUSE InUse;                                  //0x0
        struct _SLIST_ENTRY* NextFree;                                      //0x0
    };
};