copy
//0x2 bytes (sizeof)
union _HEAP_LFH_UNUSED_BYTES_INFO
{
    USHORT UnusedBytes:10;                                                  //0x0
    USHORT Spare:4;                                                         //0x0
    USHORT ExtraPresent:1;                                                  //0x0
    USHORT OneByteUnused:1;                                                 //0x0
    USHORT UnusedBytesUShort;                                               //0x0
};