struct _VI_POOL_ENTRY// Size=0x20
{
    struct _VI_POOL_PAGE_HEADER PageHeader;// Offset=0x0 Size=0x18
    struct _VI_POOL_ENTRY_INUSE InUse;// Offset=0x0 Size=0x20
    struct _SLIST_ENTRY * NextFree;// Offset=0x0 Size=0x8
};