struct _HEAP_VS_SUBSEGMENT// Size=0x18
{
    struct _LIST_ENTRY ListEntry;// Offset=0x0 Size=0x8
    unsigned long long CommitBitmap;// Offset=0x8 Size=0x8
    unsigned long CommitLock;// Offset=0x10 Size=0x4
    unsigned short Size;// Offset=0x14 Size=0x2
    unsigned short Signature:15;// Offset=0x16 Size=0x2 BitOffset=0x0 BitSize=0xf
    unsigned short FullCommit:1;// Offset=0x16 Size=0x2 BitOffset=0xf BitSize=0x1
};