Because of their work themselves with VC++ to write, to add a programmer to use the bin file and check bytes, to prevent others piracy. You can also do a simple change to the bin or the HEX file to add the CRC.

sum_check\HZK_zhuan.aps
.........\HZK_zhuan.dsp
.........\HZK_zhuan.dsw
.........\HZK_zhuan.ico
.........\HZK_zhuan.ncb
.........\HZK_zhuan.opt
.........\HZK_zhuan.plg
.........\HZK_zhuan.rc
.........\ReadMe.txt
.........\resource.h
.........\small.ico
.........\StdAfx.cpp
.........\StdAfx.h
.........\sumcheck_main.cpp
.........\sumcheck_main.cpp.bak
.........\sumcheck_main.h
.........\sumcheck_pro.h
.........\Debug\hzk_chuli.obj
.........\.....\hzk_chuli.sbr
.........\.....\HZK_Rotate90L.exe
.........\.....\HZK_Rotate90L.ilk
.........\.....\HZK_Rotate90L.pdb
.........\.....\HZK_zhuan.bsc
.........\.....\HZK_zhuan.obj
.........\.....\HZK_zhuan.res
.........\.....\HZK_zhuan.sbr
.........\.....\StdAfx.obj
.........\.....\StdAfx.sbr
.........\.....\sumcheck_main.obj
.........\.....\sumcheck_main.sbr
.........\.....\sumcheck_pro.obj
.........\.....\sumcheck_pro.sbr
.........\.....\test90.hzk
.........\.....\vc60.idb
.........\.....\vc60.pdb
.........\sumcheck_pro.cpp.bak
.........\sumcheck_pro.cpp
.........\Debug
sum_check

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