struct _HEAP_DESCRIPTOR_KEY// Size=0x4
{
    unsigned long Key;// Offset=0x0 Size=0x4
    unsigned long EncodedCommittedPageCount:16;// Offset=0x0 Size=0x4 BitOffset=0x0 BitSize=0x10
    unsigned long LargePageCost:8;// Offset=0x0 Size=0x4 BitOffset=0x10 BitSize=0x8
    unsigned long UnitCount:8;// Offset=0x0 Size=0x4 BitOffset=0x18 BitSize=0x8
};