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//0x40 bytes (sizeof)
struct _MI_ULTRA_VA_CONTEXT
{
    volatile LONG Lock;                                                     //0x0
    VOID* ZeroMapping;                                                      //0x8
    ULONGLONG AllocationHintBit;                                            //0x10
    struct _RTL_BITMAP_EX Bitmap[2];                                        //0x18
    ULONG ConcurrencyMaximum;                                               //0x38
    volatile LONG ConcurrencyCount;                                         //0x3c
};