how can i use it？

[mobious-301]

.\lua\lua.exe dxbc_reader.lua example/fragment.txt -o dxbc.out

i don‘t understand should i open .\lua\lua.exe and then？

[mobious-301]

use window cmd
cd to main folder
copy .\lua\lua.exe dxbc_reader.lua example/fragment.txt -o dxbc.out
make fragment.txt to dxbc.out